Add WebAPK's tests in ChildProcessLauncherTest.
Instrument tests are added in ChildProcessLauncherTest to connect to
child processes in a WebAPK:
- Move ChildProcessLauncherTest from //content to //chrome, because
the WebAPKs instruments tests require to pre-install a WebAPK.
- A refactoring is done to build a test WebAPK. This is because
WebAPK needs to load its host browser's code to create a renderer,
we hard code the host browser package name in the test WebAPK
be the package of chrome_public_apk.
BUG=609122
Review-Url: https://codereview.chromium.org/2076583002
Cr-Commit-Position: refs/heads/master@{#402046}
2 files changed
