Avoid destroying surface before the parent surface stops referencing it.

cc/output/compositor_frame_metadata.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_OUTPUT_COMPOSITOR_FRAME_METADATA_H_
 #define CC_OUTPUT_COMPOSITOR_FRAME_METADATA_H_
 
 #include <vector>
 
 #include "cc/base/cc_export.h"
@@ skipping 28 matching lines @@
   // precise position is computed by the renderer compositor.
   gfx::Vector2dF location_bar_offset;
   gfx::Vector2dF location_bar_content_translation;
 
   // Provides selection region updates relative to the current viewport. If the
   // selection is empty or otherwise unused, the bound types will indicate such.
   ViewportSelectionBound selection_start;
   ViewportSelectionBound selection_end;
 
   std::vector<ui::LatencyInfo> latency_info;
+
+  // A set of SurfaceSequences that this frame satisfies (always in the same
+  // namespace as the current Surface).
+  std::vector<uint32_t> satisfies_sequences;
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_COMPOSITOR_FRAME_METADATA_H_