"flutter build bundle" in Dart 2 mode now builds an assets directory
containing the application and platform kernels along with the app's other
assets.

With this patch, embedders can run these bundles by setting
FlutterProjectArgs.assets_path to the bundle directory.  In this scenario,
FlutterProjectArgs.main_path and packages_path will be ignored.

https://skia.googlesource.com/skia.git/+log/1cd6098d52a5..1ccaa6e05629

$ git log 1cd6098d5..1ccaa6e05 --date=short --no-merges --format='%ad %ae %s'
2018-04-18 mtklein skcms→b4e167a stricter TF13 matching
2018-04-18 mtklein skcms→589b15b add skcms_EnsureUsableAsDestination
2018-04-18 angle-skia-autoroll Roll third_party/externals/angle2/ c90d4d38c..5804dc8ea (2 commits)
2018-04-18 herb Simplify strike cache Node
2018-04-18 egdaniel Remove persp_shader gms from DDL blacklist
2018-04-18 angle-skia-autoroll Roll third_party/externals/angle2/ aed1b56aa..c90d4d38c (2 commits)
2018-04-17 bungeman Remove text flag filtering from SkBitmapDevice.
2018-04-17 angle-skia-autoroll Roll third_party/externals/angle2/ 86de76b69..aed1b56aa (5 commits)
2018-04-17 reed show sum of cubic errors
2018-04-17 robertphillips Add handling to ViaDDL for images that are too large to be uploaded in one go
2018-04-17 herb Move node information to SkStrikeCache
2018-04-17 bungeman IWYU for some more test files starting with 'C'.
2018-04-17 reed detect if we made an infinite rect
2018-04-17 borenet [infra] Support recursive configs in builder_name_schema
2018-04-16 egdaniel No long require copy as draw for vulkan wrapped resources.
2018-04-17 caryclark path is rect diag test is required
2018-04-17 mtklein SkStrikeDifferences::operator() -> add()
2018-04-17 reed avoid overflow by using tmp 64bits
2018-04-17 brianosman Move external texture extension logic into SkSL
2018-04-17 benjaminwagner [infra] Add service account override in gen_tasks.go.

Created with:
  roll-dep src/third_party/skia

fe606f890b Revert [vm/compiler] Canonicalize more intermediate constants in IL.
54531ad4e7 Bring in the latest pub_semver
61b15fede8 [build] Remove unnecessary inputs from uses of application_snapshot.
9968728df1 Remove package:cli_util deps from package:analyzer.
0ca8b6e5be Improve recovery when "assert" is used in an expression
6de5da1f58 fix #32649, add an option to disable asserts in DDC/K
afbaf0c4a6 Add 'Extract Widget' to getAvailableRefactorings().
d4a1896cfb Demote IMPORT_DUPLICATED_LIBRARY_NAMED to a warning
f85480b4dd Add tests for CFE implementation of expression compilation.
a865531f57 Remove two unused classes from the public API
3b7199fe63 [standalone] Only allow one outstanding load when running with --deterministic.
35fecb4a10 Issue 32896. Add isXYZ accessors to ParameterElementForLink_VariableSetter.
8df94f34fd Improve fasta parser await-for statement recovery
dd897d35a2 Move the task API out of the public API
c32e0e4bf3 [vm] Clear trailing bytes of objects that end up in snapshot images.
3a5fcf5a87 Upgrade the dep on package:isolate.
973a1a0219 Remove uses of upper-case constants in remaining SDK code.
b3595d59b3 [VM] Revert small change in FlowGraphCompiler::EmitTestAndCallCheckCid
0cbd4b520a Address review comments from change 51120
5dd283e783 fix #32270, DDC tests can now work with preview-dart-2
ce2b0db370 Improve fasta parser "assert" recovery
f8f5365a94 [vm/compiler] Fix sorting of instructions stats.
30655dcea0 [vm/aot] Treat Endian.host as a compile time constant.
eeaea82b75 Update status on test that often times out
805c08d8bf Fix a run-time type issue when running in Dart 2 mode
b1bc4ed2b5 Handle as in nested const constructors
823dfda5a5 Delete serialization, except for equivalence and helpers used in other tests.
7383cd46e0 Fix for issue 32872
86ba29265a Clean up the use of deprecated API in the analyzer_plugin package
fbb60b786f Add generic bounds test to function_type_variable_test
fd5f998796 [vm] Delta-encode offsets into ROData.
6fe7a86e7f Replace SourceFactory.resolveUri() with resolveRelativeUri() in resynthesizer.
2fb94418cd Mark mirrors test crashing.
c2b338f1b7 Remove fuzzy arrow support from analyzer
9976cddcd7 Shared cache of FileState contents.
b52931ff30 Revert "[vm/kernel] Fix non-canoncialized type arguments in partial instantiation."
c214c43758 Make LineInfo a public class
bd12c869ae [vm/kernel] Fix non-canoncialized type arguments in partial instantiation.
51a2f96a71 Always call writeAnnotationList to write annotations.
974a8ee21d Fix crash in named function expression
988de9c925 Thread forest object through calls
51f9d243e7 [VM] Mark type as finalized before calling the Canonicalize() method
a8578eaf69 Clean up some imports in Fasta type inference
e9616da13e Cleanup TypeInfo
3b414a277c Reland "[VM] Introduction of type testing stubs - Part 1-4"
c5f69dff2d Include `call` on Closure in inference
826928e2ab Use _trust to test inference of --omit-implicit-checks
6802746ad7 Fixed a couple of typos in subtyping.md
782cfe04d1 fix #32756, DDC dynamic calls to generics will work with emit-metadata
8613938e33 fix DDK to track mock setters correctly.
92f1d0fab4 [gn] Allow single or double quotes in .config
e2ee654cd1 Make a method in MempryResourceProvider private
b0fafbd1f4 Clean up js_runtime parse/tryParse methods
5e1cb4d41b Make SourceRange part of analyzers public API
1ab4cee181 Add a benchmark for running flutter analyze --flutter-repo against flutter head.
ff24a5ee6b fasta: make strong-mode inference aware of the type of LoadLibrary and CheckLibraryIsLoaded
6d7df88fa3 Delay computing file name sets until they are requested.
b7cc1e7ce7 Fix stack overflow in RTI computation
6db4ea4ca5 [vm] Use unsigned varints when possible in the clustered snapshot.

This allows the texture registry to be accessed before render surface acquisition.

giving -C twice silently only builds one directory

Isolates may be launched and awaiting snapshot association. We don't
want to send such isolates any messages before their "main" method is
called. In such cases, the engine may intercept and store certain
launch specific information.

https://skia.googlesource.com/skia.git/+log/276886160ba9..1cd6098d52a5

$ git log 276886160..1cd6098d5 --date=short --no-merges --format='%ad %ae %s'
2018-04-17 caryclark path is rect bug number twelve
2018-04-17 bungeman Add paint flags to viewer GUI.
2018-04-17 mtklein skcms→3be11ac refactor a bit
2018-04-17 liyuqian Revert "Fix the fat rect bug in the threaded backend"
2018-04-17 reed only recheck fNeedsTiling if we computed fSrcBounds
2018-04-17 brianosman Add SkColorSpace::Make, taking an skcms_ICCProfile
2018-04-16 mtklein Reland "low-hanging bilerp_clamp_8888 wins"
2018-04-17 mtklein skcms→38f22d2 name types in skcms.h
2018-04-17 herb Reorganize strike cache and glyph cache code
2018-04-16 liyuqian Fix the fat rect bug in the threaded backend
2018-04-17 caryclark yet another path is rect exploit
2018-04-17 angle-skia-autoroll Roll third_party/externals/angle2/ 08b9e046c..86de76b69 (1 commit)
2018-04-16 halcanary SkColorSetARGB in constants
2018-04-16 caryclark a more involved path is rect bug
2018-04-16 egdaniel Update our config fallback switch in GrContext.
2018-04-17 borenet Revert "Reland "[infra] Run recipes through Kitchen""
2018-04-16 borenet Reland "[infra] Run recipes through Kitchen"
2018-04-17 angle-skia-autoroll Roll third_party/externals/angle2/ a4fa9c278..08b9e046c (6 commits)
2018-04-17 mtklein Revert "low-hanging bilerp_clamp_8888 wins"
2018-04-16 mtklein low-hanging bilerp_clamp_8888 wins
2018-04-16 csmartdalton Don't support GrCubicEffect if float != fp32
2018-04-13 bungeman Add pixel geometry and dft selection to viewer app.
2018-04-16 csmartdalton Revert "ccpr: Implement conics"
2018-04-16 csmartdalton ccpr: Implement conics
2018-04-16 reed show cubic error-vectors anchored on pt(s) of max deviation
2018-04-16 herb Rename SkGlyphCacheGlobals to SkStrikeCache
2018-04-16 csmartdalton Add glFlush workaround for instanced draws on Skylake
2018-04-13 bungeman Remove SkPaint::kGenA8FromLCD_Flag.
2018-04-16 kjlubick Fix many return-std-move-in-c++11 warnings
2018-04-16 fmalita Remove unused BW mask blitters
2018-04-16 mtklein disable -Wself-assign in Google3
2018-04-16 mtklein skcms→2667f0a Add skcms_BestSingleCurve utility
2018-04-16 reed optimize fast/simple case in raster tiling
2018-04-13 liyuqian Simplify the operation on atomic fIsFinishing
2018-04-13 liyuqian Let SkCoverageDeltaList store width and use it during blitting
2018-04-11 liyuqian SkBlitter is not thread safe; make one for each thread.
2018-04-12 liyuqian Snap the bitmap as it may be changed later
2018-04-16 halcanary SkPDF: use std::aligned_storage for typed union
2018-04-16 rmistry Some Chromium bots have been LUCIfied
2018-04-16 angle-skia-autoroll Roll third_party/externals/angle2/ 76b2c3852..a4fa9c278 (3 commits)
2018-04-16 egdaniel Don't allow ganesh to allocate mip maps for wrapped textures.
2018-04-10 bsalomon Draw stroked circles with round caps analytically.
2018-04-16 liyuqian Reland "Cumulate deltas even if they're out of the clip"
2018-04-16 caryclark document SkColor.h
2018-04-16 liyuqian Revert "Cumulate deltas even if they're out of the clip"
2018-04-15 csmartdalton ccpr: Normalize the cubic inflection function instead of its roots
2018-04-05 herb Remove all notion of transport from the API - V2.
2018-04-16 robertphillips Unblacklist fixed tests on DDL3 bots
2018-04-16 mtklein skcms→019d877 add a basic profiling mode to src/Transform.c
2018-04-16 bsalomon Make TestCase class in GrShapeTest heap allocate its GrShapes

Created with:
  roll-dep src/third_party/skia

This reverts commit 75851f08.

Adds the --verbose-logging flag to enable logging at all other severities.

* Make test Dart2 compliant

* Use service and debug events instead of polling to wait for isolate to start, run and resume.

* Refactor into _onServiceEvent. Wait for 'paused' event instead of 'isolate runnable'.

After we write the pixels in the correct format,
the color type of the SkPixmap is still set to
its previous value, so the existing assertion was
failing.

* Breadcrumbs to the wiki

* Update README.md

Building image encoding into the engine bloated the
binary size. This change will return raw bytes, and
callers who use this functionality can take on the
dependency on image encoding in their apps (via a
Dart package or a platform plugin).

Fixes https://github.com/flutter/flutter/issues/16537

https://skia.googlesource.com/skia.git/+log/e669bdfad6d5..276886160ba9

$ git log e669bdfad..276886160 --date=short --no-merges --format='%ad %ae %s'
2018-04-16 borenet Revert "[infra] Run recipes through Kitchen"
2018-04-16 borenet [infra] Run recipes through Kitchen
2018-04-16 angle-skia-autoroll Roll third_party/externals/angle2/ 152152618..76b2c3852 (1 commit)
2018-04-15 rmistry Increase android compile timeout
2018-04-15 reed show flatness vectors in sample
2018-04-15 update-skps Update SKP version
2018-04-14 egdaniel Revert "Delete getRenderTargetHandle call on SkSurface."
2018-04-13 liyuqian Cumulate deltas even if they're out of the clip
2018-04-14 rmistry Reland "Whitespace change"

Created with:
  roll-dep src/third_party/skia

The old code called getBackendRenderTargetHandle() with a Read access to trigger the surface to flush, however the returned GrVkImageInfo was never used. This how process is equivalent to just calling flush on the surface so do that instead.

https://skia.googlesource.com/skia.git/+log/3462eb0346de..e669bdfad6d5

$ git log 3462eb034..e669bdfad --date=short --no-merges --format='%ad %ae %s'
2018-04-14 angle-skia-autoroll Roll third_party/externals/angle2/ 983c429fa..152152618 (7 commits)
2018-04-13 ethannicholas fix sksl standalone build error
2018-04-13 borenet Blacklist check_small_sigma_offset on Chromecast
2018-04-13 reed remove unused virtual onNotifyPixelsChanged
2018-04-13 reed rewrite iterator to make msvc happy
2018-04-13 brianosman Support downscaling to max texture size when making cross-context images
2018-04-13 borenet Add a MSVS bot to the CQ
2018-04-13 liyuqian Clone the xpos array in drawPosText
2018-04-13 ethannicholas added sk_LastFragColor
2018-04-13 reed Revert "add test for degenerate canvas dimension"
2018-04-13 reed add test for degenerate canvas dimension
2018-04-13 robertphillips Don't try to readback from the GPU for small blur sigmas
2017-12-20 herb Make a GM for checking blur bounds.
2018-04-13 angle-skia-autoroll Roll third_party/externals/angle2/ cc1293775..983c429fa (1 commit)
2018-04-13 fmalita [skottie] Harden json string parsing
2018-04-13 caryclark path is rect bug number nine
2018-04-13 hcm Update Skia milestone to 68
2018-04-13 angle-skia-autoroll Roll third_party/externals/angle2/ ed8d5ec73..cc1293775 (1 commit)
2018-04-12 liyuqian Limit our IsBadForDAA for stroke width > 0 and <= 2
2018-04-12 csmartdalton ccpr: Actually blacklist ANGLE
2018-04-12 angle-skia-autoroll Roll third_party/externals/angle2/ 14f4817c4..ed8d5ec73 (8 commits)
2018-04-12 reed can't abort looper loop, as saveCount won't be balanced
2018-04-12 egdaniel Don't create lazy proxys if their width/height is greater than max tex size
2018-04-12 robertphillips Actually generate the gm images on the DDL1 bot
2018-04-12 caryclark son of path is rect bug
2018-04-12 ethannicholas workaround for buggy macOS GLSL shader compiler
2018-04-12 egdaniel Delete getRenderTargetHandle call on SkSurface.
2018-04-12 reed check for non-finite values output by clipper
2018-04-12 brianosman Fail fast when trying to make a texture that's too large
2018-04-12 djsollen Include shadow ops in the debugger.
2018-04-11 liyuqian Reland "Add private fIsBadForDAA bit to SkPath"
2018-04-12 reed add conservative bounds to raster tiling
2018-04-12 reed always clear the looper when we're unrolling it, to not confused devices
2018-04-11 robertphillips Disable CCPR and the small path renderer on DDL1 bot
2018-04-12 caryclark another rect is path fix
2018-04-11 robertphillips Add SK_SUPPORT_LEGACY_BACKEND_OBJECTS
2018-04-11 csmartdalton Implement Sk2f Load2
2018-04-11 csmartdalton ccpr: Blacklist ANGLE again
2018-04-11 robertphillips Allow SkImage_Gpu to fail some requests in DDL mode
2018-04-11 cwallez update_meta_config: Use new LUCI optional GPU trybot on Windows
2018-04-11 csmartdalton Implement Sk4f min/max
2018-04-11 liyuqian Remove obsolete comment
2018-04-11 benjaminwagner Upgrade PixelC and NexusPlayer OS.
2018-04-12 angle-skia-autoroll Roll third_party/externals/angle2/ 2dadd1d08..14f4817c4 (2 commits)
2018-04-11 caryclark fix bm gm
2018-04-12 mtklein skcms→1654786 concat gamut transform matrices together
2018-04-11 fmalita Reland "Fix handling of MaskFilter matrices"
2018-04-11 angle-skia-autoroll Roll third_party/externals/angle2/ 785b20b7a..2dadd1d08 (11 commits)
2018-04-11 benjaminwagner Upgrade Windows Skolo bots.
2018-04-11 reed remove unused/dumb methods from SkRect
2018-04-11 reed Clean-up paints for drawImage (etc.) to enforce that we always ignore stroking and patheffects.
2018-04-11 caryclark more path is rect bugs
2018-04-11 mtklein skcms→9334796 reject non-XYZ/Lab PCS profiles
2018-04-11 liyuqian Revert "Add private fIsBadForDAA bit to SkPath"

Created with:
  roll-dep src/third_party/skia

* do not pause rendering when android view loses focus

If the rasterizer has a valid surface context, use that to create a snapshotting render target. (#4979)

* Adds a docs directory with an architecture diagram from @chinmaygarde.
* Excludes the flutter/docs directory from license script.

* Re-land "Support multiple shells in a single process. (#4932)"

This reverts commit 723c7d01.

Skia is removing SkPaint::kGenA8FromLCD (this information is now part of the SkPixelGeometry on SkSurface). This flag never appears to be mentioned anywhere else in the code and appears to be left over from being copied from blink (this code in blink used to set this flag conditionally).

Fixes https://github.com/flutter/flutter/issues/16526

We were trying to re-establish the wait after calling Reset(), but
Reset() can result in the surface being destroyed. Now we re-establish
the wait inside the Reset() machinery.

Add missing include.

* Roll dart sdk to f76dad0adcf6766d73351354da653d6a793b5abc.

Changes since last roll
```
f76dad0adc [frontend-server] Report error count on compile and recompile.
17fc446579 [vm/kernel/aot] Fix handling of calls via fields/getters in TFA
16a4ed7dc4 Remove an unused subclass of LineInfo
c7e4a7d333 [ VM / CFE ] Added override to allowPlatformPrivateLibraryAccess in VmTarget for tests which need to import dart:_internal.
1e312819ca Ensure errors guard erroneous expressions.
0f3b9f302b [vm/compiler] Fix assertion in the constant propagator.
9995feba8e Adjusted status for ListMixin_class_A01_t02
03d7a9e55c Revert "[VM] Improve quality of codegen for crypto operations"
7cc4d76a30 Add tryParse alternatives to parseFunctions.
58a6bfd974 Improve identifier recovery in expressions
17d6d470a2 [VM] Remove experimental, unused, argument bits from argdesc and reduce prologue size
5909932d38 [vm/compiler] Canonicalize more intermediate constants in IL.
df6055d876 Only bypass cache when .packages is invalidated
5aec8ad6fb Delete invalidated builder loaded from dill
82fed79ed1 [VM] Improve quality of codegen for crypto operations
d27b98c513 [VM] Slightly better behaviour in out-of-memory situation
b20bab56a0 [fuchsia] Update timezone service integration
430abca69a [ VM ] Removed unnecessary assignment to Function::null() when target was already NULL.
2ddc5495f8 Reduce DDC signature overhead
25702d355e [VM / frontend-server] Add ability to pass the 'sync-async' flag into the front end server so that 'flutter tools' can choose to turn it off or on.
8df4042b2d fix #32088, DDC calls nSM for signature mismatch
d52a0419f6 [VM bigint] Fix digit array size calculation for _divRem result (fixes #32739). Add regression test to existing bigint test.
a9c3dabb4c fix #32769, performance regression in Analyzer callable function support
b3c94b5d52 Revert "Reland "[VM] Introduction of type testing stubs - Part 1-4""
77116c14be Show isolate memory usage in the analysis server diagnostics page.
a90a74cfd8 JSArray strong mode performance fixes
cbdf102d0c Use interceptor for reading type arguments
9d4da03309 Roll dart2js_info to 0.5.6+2
a35bf88f9d Run pub upgrade on analyis plugins before (re)start.
1db1ac4863 Produce a single-file analyzer for Goma.
072bd1c88e Remove KernelLibraryBuilder proxies
12950e8170 Fix the windows bot and update a missed test
cf8c76dc50 [vm/compiler] Restore old print-flow-graph behavior.
a60d803913 [infra] Add --no-preview-dart-2 support for the analyzer to test.py
```

* Update license hash. No changes to the licenses.