Add gpu::MailboxHolder to hold state for a gpu::Mailbox

gpu::Mailbox by itself can hold only a texture id, but in common usage it comes
with texture target and syncpoint information for cross-context sharing.  To
reduce repetition of this pattern, gpu::MailboxHolder holds:

* a gpu::Mailbox
* a GL texture target
* a syncpoint index

Refactor other classes to use a gpu::MailboxHolder instead of separate
gpu::Mailbox and associated state.

Syncpoints are created with uint32 indices; make sure all uses of syncpoints
use the appropriate type.

BUG=None
TEST=local build, unittests on CrOS snow, desktop Linux
TBR=piman@chromium.org, enn@chromium.orge, cevans@chromium.org, scherkus@chromium.org

Review URL: https://codereview.chromium.org/132233041

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248612 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 1 insertions, 1 deletions

diff --git a/cc/resources/single_release_callback.cc b/cc/resources/single_release_callback.cc
index 9c6b9de..4565963 100644
--- a/cc/resources/single_release_callback.cc
+++ b/cc/resources/single_release_callback.cc
@@ -20,7 +20,7 @@ SingleReleaseCallback::~SingleReleaseCallback() {
       << "SingleReleaseCallback was never run.";
 }
 
-void SingleReleaseCallback::Run(unsigned sync_point, bool is_lost) {
+void SingleReleaseCallback::Run(uint32 sync_point, bool is_lost) {
   DCHECK(!has_been_run_) << "SingleReleaseCallback was run more than once.";
   has_been_run_ = true;
   callback_.Run(sync_point, is_lost);