Android: Use kUIPrioritizeInGpuProcess

R=piman@chromium.org

Review URL: https://codereview.chromium.org/60893003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234861 0039d316-1c4b-4281-b951-d872f2087c98
Mojo: Implement local passing of MessagePipes.

I.e., allow handles to MessagePipes to be transferred across
MessagePipes whose ends are both local (i.e., in-process).

There's one basic test of this functionality in this change, but much
more is needed.

Also, in theory, a handle to a remote (proxied) MessagePipe can be
transferred across a local MessagePipe, but this is not tested.

R=davemoore@chromium.org, davemoore

Review URL: https://codereview.chromium.org/66963005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234863 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 234861
SVN changes up to revision 234863