GitLab

Main interfaces added:

1. Add methods in CastContentWindow and CastContentWindow.Delegate for Cast Activity and WebApplication

2. Add methods in CastContentWindowAndroid for JNI calls between Java and C++

3. Add some methods and intent types in CastWebContentComponent for calling between CastContentWindowAndroid and CastWebContentComponent, and between CastWebContentComponent and CastWebContentsFragment

4. Add some intent types for calling between CastWebContentComponent/CastWebContentsFragment and external activity.

Design doc: go/cast-to-android

Test: cast_shell_junit_tests browsertests

Bug: b/65100261 b/72227153 b/72436346 b/72237087 b/72912957 b/72436104 b/72712171

Change-Id: I09056f6fe78341e545c5e1342640a4dfddff28f4
Reviewed-on: https://chromium-review.googlesource.com/940809
Commit-Queue: Zhiheng(Vincent) Li <vincentli@google.com>
Reviewed-by: Luke Halliwell <halliwell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543204}