This does several things:
- It adds CPU time on the IO thread, but avoids GPU time on the GPU
  thread.
- For images that are never drawn with mipmaps, it adds about 33%
  memory overhead. For images that are drawn with mipmaps, it saves
  an entire copy of the base level.
- It fixes https://github.com/flutter/flutter/issues/24517, which is
  a driver bug related to mip-mapping and cross-context images.

Overall, I think the tradeoff is good, but I'm curious to see what
benchmarks look like.

Avoids potential confusion due to the iOS framework already being called
Flutter.framework.

* Dynamic patching support for AOT mode.

* Cleanup.

https://skia.googlesource.com/skia.git/%2Blog/f2a3f5943e4c..37064c1739f3

git log f2a3f5943e4ca1a3c33b352664231523e0ce9053..37064c1739f3feb46862791fde9903c0d64d5135 --date=short --no-merges --format=%ad %ae %s
2019-02-08 brianosman@google.com Remove support for GPU bone transformations
2019-02-08 mtklein@google.com add more test cases to DAA gm
2019-02-08 robertphillips@google.com Move auditTrail and opMemoryPool from GrContext to GrRecordingContext
2019-02-08 brianosman@google.com Fix vertex indexing error when using ImGui skiaWidgets
2019-02-07 mtklein@google.com move some methods out of line
2019-02-07 herb@google.com Simplify typeface and effects handling
2019-02-07 robertphillips@google.com Move proxyProvider and singleOwner to GrImageContext
2019-02-08 mtklein@google.com remove a couple more jsoncpp deps
2019-02-08 jcgregorio@google.com docs - Trim down infra trooper docs.
2019-02-08 kjlubick@google.com Remove abandoned fSubdivisionsMax
2019-02-08 recipe-roller@chromium.org Roll recipe dependencies (trivial).

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

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52f5e34dbf Move JsToFrontendMap to js_world_builder and add toBackendConstant.
30d760e0c9 Add unittest of allocator analysis for the K model
45f55183c5 Refactor processing of pragma annotations
b2bffb2147 Revert "[dartdevc] skip co19 tests on linux bots"
3fab17ee58 Display CFE message contexts

https://skia.googlesource.com/skia.git/%2Blog/44bffbfc1c3e..f2a3f5943e4c

git log 44bffbfc1c3e6be6580ec2f7f209b4a2115b7014..f2a3f5943e4ca1a3c33b352664231523e0ce9053 --date=short --no-merges --format=%ad %ae %s
2019-02-08 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/angle2 52d861bd49cc..cd4f1fbaabce (27 commits)
2019-02-07 borenet@google.com Roll third_party/externals/angle2 a54104803d72..52d861bd49cc (8 commits)
2019-02-08 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src 635f11205d4b..3e6732ee4ac8 (349 commits)

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

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If the roll is causing failures, please contact the current sheriff (fmalita@google.com), and stop
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https://skia.googlesource.com/skia.git/%2Blog/26490759e464..44bffbfc1c3e

git log 26490759e46483558627c9132e31f4b97cf052ac..44bffbfc1c3e6be6580ec2f7f209b4a2115b7014 --date=short --no-merges --format=%ad %ae %s
2019-02-07 recipe-roller@chromium.org Roll recipe dependencies (trivial).

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

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246430bc8c [dartdevc] wait for async callbacks to complete in tests

https://skia.googlesource.com/skia.git/%2Blog/50e24d7d5f52..26490759e464

git log 50e24d7d5f52724b4286078a813eb253e710fe47..26490759e46483558627c9132e31f4b97cf052ac --date=short --no-merges --format=%ad %ae %s
2019-02-08 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update go_deps asset
2019-02-07 ericrk@chromium.org Fix issue where command buffer was skipped if drawing a single drawable
2019-02-08 skia-autoroll@skia-public.iam.gserviceaccount.com Roll third_party/externals/swiftshader c81766320762..7fb0b73b1aa7 (1 commits)

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

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This target is now in //sdk/fidl.

https://skia.googlesource.com/skia.git/%2Blog/d978b90d205d..50e24d7d5f52

git log d978b90d205d76206e9d15cd8c4db8743350e023..50e24d7d5f52724b4286078a813eb253e710fe47 --date=short --no-merges --format=%ad %ae %s
2019-02-07 csmartdalton@google.com Add a mechanism for GMs to silently exclude themselves from Gold
2019-02-07 benjaminwagner@google.com [infra] Update Win10 in Skolo.
2019-02-07 recipe-roller@chromium.org Roll recipe dependencies (trivial).
2019-02-07 csmartdalton@google.com Reland "Add a GpuGM class for GPU-only tests"

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9c0a73f943 [dart/vm] Skip finalization error for now
b05b8777d4 [dart/fuzzer] Refactor switch setup, add VFP to ARM
5a7ecfbabe [dart/vm] Skip finalization error for now
26379d088d Update dartfix to report path of resource if resource changes during analysis
2710834272 [fuchsia] Update path to fuchsia.timezone
da7ed9b05a Add missing generics in FlowAnalysis.
21b596e1b1 Change NullabilityFixKind from enum to class
d84ec89f39 add NullabilityMigrationListener for communicating changes to the client
9f0301630f Update dartfix NNBD to use 2-pass analysis
70283bdb3a Improve choosing context for changes files.
dbf4900c99 [vm/tools] Fix issues with snapshot size reporting
1c8f571f76 Add source links to dartdoc output.
a0516965b4 [vm] Load top-level functions and variables lazily
20f12ad874 [gardening] Re-add two status file lines after landing d05000af4d
073f557b1a Temporary fix for Analysis Server tests on Windows.
d05000af4d [gardening] Remove flaky markers and close issues for tests not appearing in flakiness dashboard
ac95355fdb Compiler option for environment defines
0e4f917759 Implement subtyping of optional function parameters
c84a0bd932 Infer mixin applications in hierarchy builder
2fd96e75d6 Separate MixinInferrer from Kernel ClassHierarchy
8927bc8d38 Remove ConstraintGatherer's dependency on TypeSchemaEnvironment
5a98aa704b Extract StandardBounds to a mixin
86f5aed890 Finish implementing IsTypedefSubtypeOf
d373b2ce9c [gardening] Disable golden test until next engine roll
a8a9171dd8 Avoid crashing on this property access
33bc628235 Treeshake unread fields
b040d3c853 Improve error message on ambiguous constructors
c591454dd3 Inline unprovided optional parameters
3afc3b58d0 Add dartfix protocol integration tests
67a1ce6b34 Notify DeclarationsTracker about file changes.
876e671a2c Migrate DeclarationResolverTest.

https://skia.googlesource.com/skia.git/%2Blog/8619a34bb875..d978b90d205d

git log 8619a34bb87565dfcfc3818ceab065e93ea183e6..d978b90d205d76206e9d15cd8c4db8743350e023 --date=short --no-merges --format=%ad %ae %s
2019-02-07 bsalomon@google.com Track separate texure binding states for each OpenGL texture target.
2019-01-18 halcanary@google.com SkQP: new tool: tools/skqp/find_commit_with_best_gold_results
2019-02-07 brianosman@google.com Check for single owner and abandoned context in createMipMapProxyFromBitmap
2019-02-07 recipe-roller@chromium.org Roll recipe dependencies (trivial).
2019-02-07 jvanverth@google.com Fix Metal bots.
2019-02-07 halcanary@google.com SkQP: update tools/skqp/gn_to_bp.py, add release script
2019-02-07 bsalomon@google.com Cache CPU memory buffers used for client side arrays.
2019-02-07 bungeman@google.com Don't include .cpp file in SampleCCPRGeometry.cpp
2019-02-07 brianosman@google.com Give ImGui the correct DeltaTime
2019-01-30 djsollen@google.com Remove colorspace restrictions for 565/FP16 configs in Android Codec.
2019-02-07 mtklein@google.com skvx wip
2019-02-07 bsalomon@google.com Default init GrGpuResource::UniqueID to invalid id.
2019-02-07 robertphillips@google.com Move "matches" from GrContextThreadSafeProxy to GrContext_Base
2019-02-07 robertphillips@google.com Make room for shifting GrContext to GrDirectContext
2019-02-07 recipe-roller@chromium.org Roll recipe dependencies (trivial).
2019-02-07 brianosman@google.com Support building mips when creating cross context images
2019-02-07 bsalomon@google.com Pin the quad index buffer in GrResourceProvider.

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

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`MultiFrameCodec` now uses whatever previously cached required frame is
available instead of panicking if it doesn't have the exact frame
requested by `SkCodec::FrameInfo#fRequiredFrame`.

`SkCodec::FrameInfo#fRequiredFrame` doesn't point to the one and only
frame that's required to decode the given frame. It points to the latest
frame that's disposal method none and filling a greater surface area
than the current frame. The last required frame `MultiFrameCodec` has
actually cached is also valid in these cases and can be supplied as
`fPriorFrame` instead. [flutter/flutter#26757](https://github.com/flutter/flutter/issues/26757#issuecomment-459522530)
has a more detailed explanation.

Fixes flutter/flutter#26757

https://skia.googlesource.com/skia.git/%2Blog/9564bf44e5fa..8619a34bb875

git log 9564bf44e5fa000c32ae9390326181dbd89c4b59..8619a34bb87565dfcfc3818ceab065e93ea183e6 --date=short --no-merges --format=%ad %ae %s
2019-02-07 reed@google.com Revert "Hide setDrawLooper -- deprecate loopers"
2019-02-07 recipe-roller@chromium.org Roll recipe dependencies (trivial).
2019-02-07 brianosman@google.com Remove duplicate entry in harfbuzz GN file
2019-02-07 bsalomon@google.com Use different classes for client side arrays and GPU buffer objects.
2019-02-07 abarth@google.com [fuchsia] Update path to fuchsia.fonts
2019-02-06 robertphillips@google.com Add support for Mtl backend to DeferredDisplayListTest
2019-02-07 fmalita@chromium.org [skshaper] Add per-line callback
2019-02-07 jvanverth@google.com Set correct uniform size for Metal.
2019-02-07 fmalita@chromium.org [skottie] Use SkShaper for text
2019-02-07 mtklein@google.com move Reporter::reportFailedWithContext() out of line

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

Documentation for the AutoRoller is here:
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If the roll is causing failures, please contact the current sheriff (fmalita@google.com), and stop
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This header is now spelled thusly.

https://skia.googlesource.com/skia.git/%2Blog/c19d81acc096..9564bf44e5fa

git log c19d81acc0965eff7ac1f8a2f9e544dfc86a230f..9564bf44e5fa000c32ae9390326181dbd89c4b59 --date=short --no-merges --format=%ad %ae %s
2019-02-06 benjaminwagner@google.com Upgrade NVIDIA driver on Ubuntu18 QuadroP400 bots.
2019-02-06 egdaniel@google.com Add support for importing AHardwareBuffers into SkSurfaces.
2019-02-07 scroggo@google.com SkWuffsCodec: Initialize memory when incomplete
2019-02-07 kjlubick@google.com Add a k8s cheat sheet to trooper docs
2019-02-06 reed@google.com Hide setDrawLooper -- deprecate loopers

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

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If the roll is causing failures, please contact the current sheriff (fmalita@google.com), and stop
the roller if necessary.

https://skia.googlesource.com/skia.git/%2Blog/859db6b5a03c..c19d81acc096

git log 859db6b5a03c4d87df06ff3f4b289bda4b5c4022..c19d81acc0965eff7ac1f8a2f9e544dfc86a230f --date=short --no-merges --format=%ad %ae %s
2019-02-07 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src c27b32b2fd52..635f11205d4b (414 commits)
2019-02-07 csmartdalton@google.com Revert "Add a GpuGM class for GPU-only tests"

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

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6c680a0ebd Update dartfix readme and update version numbers
33337cf8d0 Fix API breakage, reexport ConstantEvaluator.
c2cdc1c639 Allow migration of multiple files at once.
d68d8526f4 Allow nullabilty migration prepareInput/processInput to operate on different ASTs.
5ecf660b50 [dartdevc] skip co19 tests on linux bots
ba9fbda83e Rework provisional migration API.
a4b681b83a Update dartdoc to 0.28.1+2.
fea5413d5a [ VM ] Fix hang of Flutter engine tests caused by global RuntimeEntry objects being destroyed when exit() is called when the VM hasn't finished shutting down.
a5570bd995 [vm/compiler] Add optimization flag
f0d5cb73a9 Guard the custom formatter for a Map against errors
df779789f2 Support two more cases in the convert-to-spread assist (issue 35867)
fd2225ab6c Adapt to the flow analysis spec v2.

https://skia.googlesource.com/skia.git/%2Blog/f36ad269e88a..859db6b5a03c

git log f36ad269e88a1b2fec16e6404cd6cd36bc202115..859db6b5a03c4d87df06ff3f4b289bda4b5c4022 --date=short --no-merges --format=%ad %ae %s
2019-02-07 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update go_deps asset

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

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https://skia.googlesource.com/skia.git/%2Blog/2fc1474f9d62..f36ad269e88a

git log 2fc1474f9d62db4b854fd4e5af322f41a323ffe5..f36ad269e88a1b2fec16e6404cd6cd36bc202115 --date=short --no-merges --format=%ad %ae %s
2019-02-06 recipe-roller@chromium.org Roll recipe dependencies (trivial).
2019-02-04 reed@google.com move SkMetaData into src

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

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https://skia.googlesource.com/skia.git/%2Blog/429251513f71..2fc1474f9d62

git log 429251513f716de18e9c4ebda05f304eb97fedde..2fc1474f9d62db4b854fd4e5af322f41a323ffe5 --date=short --no-merges --format=%ad %ae %s
2019-02-06 bungeman@google.com Add BOT/EOT to Shaper.
2019-02-06 halcanary@google.com bin/gn format gn/skia.gni
2019-02-06 herb@google.com Remove the distinction between key and device descriptors
2019-02-06 bungeman@google.com Roll HarfBuzz
2019-02-06 halcanary@google.com SkLoadICU: simplify
2019-02-06 robertphillips@google.com Move GrContextPriv methods to their own .cpp file
2019-02-06 mtklein@google.com add mad() and shuffle() to SkVx
2019-02-05 csmartdalton@google.com Add a GpuGM class for GPU-only tests

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caa8747a37 Rework dartfix NNBD fix to use new NullabilityMigration engine
ae5bd68570 Lower relevance of deprecated suggestion sets.

Allows embedders to specify a callback to be invoked in isolate scope
once root isolate has been created and marked runnable.

As an example of where this is useful, embedder unit test fixtures may
want to include Dart functions backed by a native implementation. On
isolate creation, this patch allows the unit test author to call
Dart_SetNativeResolver in root isolate scope.

adfa4791fc Improve storage for available declarations.
392a869ee4 [infra] Skip all co19_2 tests that are timing out on dartdevc.
033cb7ffcc Issue 1438. Use expression function body for createState().
c3542cbc3b Set relevance for IncludedSuggestionSet.
661e91e30e Extract and migrate tests for ConstantEvaluator.
cc74e20eee Make some fields on Interface private, and change the way InheritanceManager2 is tested.
512e2ef292 Extract FixCodeTask/Processor from main dartfix class
e4755b34ba Extract FixLintTask/Processor from main dartfix class
1e8f9bf63a Extract FixErrorTask/Processor from main dartfix class
5ae156e055 Extract DartFixListener to record source changes and recommendations
1c0422735e Abstract type operations in flow analysis.
efcf8b01b1 Move integration tests of migration API to analysis server.
8f821d408e Fix status files for dartkp
6b73a02937 Fix status files for simarm and simarm64
4fb220707e Hardcode SourceFileEdit.fileStamp to -1 in migration prototype.
d972c2b7b7 [vm] Update raw_object_fields.cc after 7e81f56a.
c2778062e7 Add UI as code status file entries for simarm
2b8560f4b2 [Fasta] Add spread and control-flow collection flags
dc812e0921 [infra] Add third_party/requirejs to the fileset used by dartdevc testing
7e81f56ad7 Save Initializer for field and pass into debugger to enable breakpoint setting.

https://skia.googlesource.com/skia.git/%2Blog/455c74797b46..429251513f71

git log 455c74797b4692d7dbb19a1b99c3fa3e89ca9d50..429251513f716de18e9c4ebda05f304eb97fedde --date=short --no-merges --format=%ad %ae %s
2019-02-06 mtklein@google.com fill in most remaining skvx operations
2019-02-06 recipe-roller@chromium.org Roll recipe dependencies (trivial).
2019-02-06 herb@google.com Remove filterRec bypass on MakeRecAndEffects
2019-02-06 rmistry@google.com Have the RecreateSKPs bot upload to partner bucket
2019-02-05 herb@google.com Reorganize MakeRecAndEffects and SkScalerContext ctor
2019-02-06 reed@google.com per-contour variant of SkPathMeasure
2019-02-06 rmistry@google.com Remove PerCommit-Bookmaker
2019-02-06 jvanverth@google.com Switch back to non-Retina display resolution.

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MSVC won't compile wuff...

https://skia.googlesource.com/skia.git/%2Blog/37b7d41d01cb..455c74797b46

git log 37b7d41d01cb3e0930c74aa70cb98e6cdaf8ad27..455c74797b4692d7dbb19a1b99c3fa3e89ca9d50 --date=short --no-merges --format=%ad %ae %s
2019-02-05 mtklein@google.com sketch SkVx
2019-02-06 benjaminwagner@google.com Add DDL jobs for Intel
2019-02-06 ethannicholas@google.com fixed SRGB effect color accuracy
2019-02-06 recipe-roller@chromium.org Roll recipe dependencies (trivial).
2019-02-06 brianosman@google.com Remove all references to jsoncpp (build scripts, DEPS, etc)
2019-02-06 brianosman@google.com Convert bookmaker to SkJSON
2019-02-06 recipe-roller@chromium.org Roll recipe dependencies (trivial).
2019-02-05 brianosman@google.com Fix makeColorSpace on YUV images

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

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https://skia.googlesource.com/skia.git/%2Blog/3abdd7a90e45..37b7d41d01cb

git log 3abdd7a90e453ba7a9e2cad76e3526195ece14a6..37b7d41d01cb3e0930c74aa70cb98e6cdaf8ad27 --date=short --no-merges --format=%ad %ae %s
2019-02-06 reed@google.com Revert "templatize drawString"
2019-02-06 skia-autoroll@skia-public.iam.gserviceaccount.com Roll ../src 6c1a9ccaf5f3..c27b32b2fd52 (449 commits)

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631c550ff9 Extract and migrate ExitDetector and its tests.

https://skia.googlesource.com/skia.git/%2Blog/fac1e367f428..3abdd7a90e45

git log fac1e367f4283c2b7d1e40001a05f598ec0cf3fa..3abdd7a90e453ba7a9e2cad76e3526195ece14a6 --date=short --no-merges --format=%ad %ae %s
2019-02-06 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update go_deps asset

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