gpu: Thread-safe command buffer state lookup.

gpu/command_buffer/tests/gl_manager.cc

Index: gpu/command_buffer/tests/gl_manager.cc
diff --git a/gpu/command_buffer/tests/gl_manager.cc b/gpu/command_buffer/tests/gl_manager.cc
index a9e0a305de7aa4ccf9c7c9757bb8041a53bf5d32..571cf313b3a56feea5c196451eb32b37945472a4 100644
--- a/gpu/command_buffer/tests/gl_manager.cc
+++ b/gpu/command_buffer/tests/gl_manager.cc
@@ -633,6 +633,10 @@ bool GLManager::IsFenceSyncFlushReceived(uint64_t release) {
   return IsFenceSyncRelease(release);
 }
 
+bool GLManager::IsFenceSyncReleased(uint64_t release) {
+  return release <= command_buffer_->GetLastState().release_count;
+}
+
 void GLManager::SignalSyncToken(const gpu::SyncToken& sync_token,
                                 const base::Closure& callback) {
   if (sync_point_manager_) {