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Broke runtime_unittests, which are still running directly from source.

This reverts commit 0ea93c3a.

Eliminates support for running directly from sources or script snapshots. In
debug mode, we run from a kernel snapshot; in profile and release modes, we
link in AOT-compiled code.

Renames --dart-non-checked-mode to --disable-dart-asserts since checked mode
does not make sense in Dart 2.

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* Allow specifying the foreground paint

* fix typo

* doc update

* call paint.reset

Support for saving Dart compilation trace on device.

* Enforce clang-format on all files in commit

This re-enforces clang-format across all files changed in the commit.

In c10c4173, we enabled checking only for the lines changed in the diff
in order to reduce the change of merge conflicts with the shell refactor
landed in 58e84c8b.

* Reformat sources to match latest clang-format

As part of re-enabling clang-format across the codebase, reformat all
code to match the latest toolchain.

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On a Linux host, we were having to convert the type of the bitmap to N32, but we weren't also fixing the channel order to RGBA, so consequently we were getting BGRA when the API was asking for RGBA. This forces the color format to be RGBA when that is what is asked for.

We weren't needing to do conversion on macOS, so macOS was always getting RGBA.

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Fix compile error introduced in #5473.

Support running bundles from zip file.

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Paragraph layout breaks the text into lines, and ellipsizing (if applicable)
will truncate the last run of a line at the point where word wrap would have
occurred.

Fixes https://github.com/flutter/flutter/issues/18198

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https://skia.googlesource.com/skia.git/+log/2d7678d..18562b8

Created with:
  gclient setdep -r src/third_party/skia@18562b8

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

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.

I forgot that the identifiers need to be unique per page for the animation tags.
This makes them unique.

Doc change only, no code.

This updates the documentation for StrokeJoin and StrokeCap to contain animated diagrams that describe their function. The actual diagrams reside in the assets-for-api-docs repo.

libtxt will query Skia for a fallback typeface when it encounters a character
that is not found in the primary font.  The font collection should make all
the variants of the fallback typeface's font family available to Minikin for
use in future font lookups.

Fixes https://github.com/flutter/flutter/issues/17985

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* Move the handling of delegating AppDelegate callback out of FlutterAppDelegate.

Also moves the plugin registry to FlutterViewController. So each view-controller will handle its
own plugins.

This is intended to simplify including one or more Flutter views in an existing iOS app and giving
more precise control of plugin registration.

Fixes: https://github.com/flutter/flutter/issues/16539

* formatting

* Update license golden file

* Fixed type error

* FREEZE.unindexed

* Fix Header types

* Revert "FREEZE.unindexed"

This reverts commit bebb70056c9bcb90b4321bdc2873896623ed6faa.

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Adds --dynamic and --interpreter flags to
tools/gn. These flags result in engines with
properties as follows:

--dynamic:
- JIT targeting native code on Android and
  DBC on iOS

--interpreter
- Target DBC even if running on Android.

For example:

gn --android --dynamic --interpreter --runtime-mode release

Will generate an engine:
- Without Dart asserts
- Without Observatory
- With JIT compililation to DBC

into out/android_dynamic_release_dbc

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