[sync] Fix sync tests for Android.

This fixes and re-enables all the host driven sync tests.

NOTRY=true
BUG=329757,309997,311091

Review URL: https://codereview.chromium.org/168833004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252154 0039d316-1c4b-4281-b951-d872f2087c98
Prevents crash when docking a detached panel while fullscreen window is active

BUG=344909
TEST=Manual - follow steps in the bug.

Review URL: https://codereview.chromium.org/172243005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252155 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252154
SVN changes up to revision 252155