gpu: Thread-safe command buffer state lookup.

gpu/gles2_conform_support/egl/context.cc

Index: gpu/gles2_conform_support/egl/context.cc
diff --git a/gpu/gles2_conform_support/egl/context.cc b/gpu/gles2_conform_support/egl/context.cc
index 2d870e7dc2dca6c0317e68995195ee306d4083e0..041eac6f7f0cb8f59a639dd397467f8acf6580f7 100644
--- a/gpu/gles2_conform_support/egl/context.cc
+++ b/gpu/gles2_conform_support/egl/context.cc
@@ -221,6 +221,11 @@ bool Context::IsFenceSyncFlushReceived(uint64_t release) {
   return display_->IsFenceSyncFlushReceived(release);
 }
 
+bool Context::IsFenceSyncReleased(uint64_t release) {
+  NOTIMPLEMENTED();
+  return false;
+}
+
 void Context::SignalSyncToken(const gpu::SyncToken& sync_token,
                               const base::Closure& callback) {
   NOTIMPLEMENTED();