gpu: Add sync token dependencies to flush metadata.

cc/test/test_context_support.h

Index: cc/test/test_context_support.h
diff --git a/cc/test/test_context_support.h b/cc/test/test_context_support.h
index 457e227e80d3ac303cf7059584497aadf035eb64..c12776c2917136d02894b9fd0a5c4c03b3d327cc 100644
--- a/cc/test/test_context_support.h
+++ b/cc/test/test_context_support.h
@@ -29,7 +29,7 @@ class TestContextSupport : public gpu::ContextSupport {
   // gpu::ContextSupport implementation.
   void SignalSyncToken(const gpu::SyncToken& sync_token,
                        const base::Closure& callback) override;
-  bool IsSyncTokenSignalled(const gpu::SyncToken& sync_token) override;
+  bool IsSyncTokenSignaled(const gpu::SyncToken& sync_token) override;
   void SignalQuery(uint32_t query, const base::Closure& callback) override;
   void SetAggressivelyFreeResources(bool aggressively_free_resources) override;
   void Swap() override;