gpu: Thread-safe command buffer state lookup.

cc/test/test_context_support.cc

Index: cc/test/test_context_support.cc
diff --git a/cc/test/test_context_support.cc b/cc/test/test_context_support.cc
index e1b94a5d278b63d738e9ee61311c432380fccff3..74d9983efbd8c5a4e80f667314da3eac39e79781 100644
--- a/cc/test/test_context_support.cc
+++ b/cc/test/test_context_support.cc
@@ -27,6 +27,10 @@ void TestContextSupport::SignalSyncToken(const gpu::SyncToken& sync_token,
                             weak_ptr_factory_.GetWeakPtr()));
 }
 
+bool TestContextSupport::IsFenceSyncReleased(uint64_t release) {
+  return true;
+}
+
 void TestContextSupport::SignalQuery(uint32_t query,
                                      const base::Closure& callback) {
   sync_point_callbacks_.push_back(callback);