12479 Refactoring text_editing.dart

12563 Remove use of the blobs snapshot format from unittests

12565 Remove references to topaz

12573 [flutter_runner] Refactor thread_application pair to ActiveApplication

12618 Add isFocusable to SemanticsFlag

12681 Create a package-able incremental compiler

12695 Add onUnregistered callback in ‘Texture’ and ‘FlutterTexture’

12698 [web_ui] Fixing invalid state bug for text editing

12699 Adding ‘pub get’ to the ‘compile_xxxx.sh’ in the Scenario app

12700 Add missing flag for embedder.

12701 Cleanup: Made a macro to assert ARC is enabled.