gpu: reference target surfaces through a globally unique surface id.
This allows the gpu process to ignore all knowledge of renderers. It simplifies
some of the gpu <-> browser and gpu <-> renderer IPC, but mostly paves the way
for non-renderer clients.
Surfaces are kept in a global GpuSurfaceTracker which is just a thread-safe map.
BUG=99516
TEST=covered by existing tests. Run chrome, open poster circle (or other accelerated content page).
Review URL: http://codereview.chromium.org/9194005
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@118172 0039d316-1c4b-4281-b951-d872f2087c98
66 files changed
