The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e7c8abfdf3ce705d4070c4d5c457381dbee89a84

commit e7c8abfdf3ce705d4070c4d5c457381dbee89a84
Author: liberato <liberato@chromium.org>
Date: Mon May 08 20:27:04 2017

Fetch the surface from GpuSurfaceTracker for mojo AndroidOverlay.

This CL makes the mojo AndroidOverlay client fetch the Android
surface from GpuSurfaceTracker when notified by the service that
the overlay is ready.

This also updates the tests to register a surface, and verify
that the same one is returned by the mojo client.

BUG= 719591 

Review-Url: https://codereview.chromium.org/2867633002
Cr-Commit-Position: refs/heads/master@{#470106}

[modify] https://crrev.com/e7c8abfdf3ce705d4070c4d5c457381dbee89a84/media/mojo/BUILD.gn
[modify] https://crrev.com/e7c8abfdf3ce705d4070c4d5c457381dbee89a84/media/mojo/clients/BUILD.gn
[modify] https://crrev.com/e7c8abfdf3ce705d4070c4d5c457381dbee89a84/media/mojo/clients/mojo_android_overlay.cc
[modify] https://crrev.com/e7c8abfdf3ce705d4070c4d5c457381dbee89a84/media/mojo/clients/mojo_android_overlay_unittest.cc