This does not actually import the runners into the engine. It only sets up the targets so they need no modifications are necessary when the migration is done. The engine has been verified to build in both buildroots.

This argument has been defunct for a while. It was originally added as a
means of testing the AOT machinery in debug modes.

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

Now lib/ui depends on sky/engine rather than the reverse.

https://github.com/flutter/flutter/issues/4866

We can't quite build it yet because libwtf.a depends on //third_party/icu,
which we don't have yet, but this patch gets us closer.

This include build system changes for selecting Dart's precompiler mode
plus a way to locate and load the precompiled snapshot library from an
Android application

We no longer use IDL.

This matches the behaviour of the Mojo Dart controller and was requested by tonyg@

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1152873006

- New chromium clang rules require explicit external destructors so
  system/lib added for MessagePipe, DataPipe and SharedBuffer
- New chromium clang rules require override and no virtual in
  declarations, so many files updated.
- cc_strip_video patch updated.

BUG=
R=jamesr@chromium.org

Review URL: https://codereview.chromium.org/988693005

We're interested in experimenting with using the DartVM in Sky. This build-time
flag will let us add Dart bindings without disrupting other working going on in
Sky.

R=rafaelw@chromium.org

Review URL: https://codereview.chromium.org/875103002

Change generated by running the following command:

for x in `git ls-files *.gni`; do gn format --in-place $x; done

This came up as an issue in https://codereview.chromium.org/801523002/, but I
didn't want to add noise to that CL.

R=qsr@chromium.org, qsr

Review URL: https://codereview.chromium.org/794413003

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/737793006