Force use of and cache render surface.

cc/surfaces/surface_aggregator.h

 // Copyright 2014 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_SURFACES_SURFACE_AGGREGATOR_H_
 #define CC_SURFACES_SURFACE_AGGREGATOR_H_
 
 #include <memory>
 #include <unordered_map>
 
@@ skipping 112 matching lines @@
   void CopyUndrawnSurfaces(PrewalkResult* prewalk);
   void CopyPasses(const CompositorFrame& frame, Surface* surface);
   void AddColorConversionPass();
 
   // Remove Surfaces that were referenced before but aren't currently
   // referenced from the ResourceProvider.
   // Also notifies SurfaceAggregatorClient of newly added and removed
   // child surfaces.
   void ProcessAddedAndRemovedSurfaces();
 
-  void PropagateCopyRequestPasses();
+  void PropagatePasses(base::flat_set<int>* passes);
 
   int ChildIdForSurface(Surface* surface);
   gfx::Rect DamageRectForSurface(const Surface* surface,
                                  const RenderPass& source,
                                  const gfx::Rect& full_rect) const;
 
   SurfaceManager* manager_;
   ResourceProvider* provider_;
 
   // Every Surface has its own RenderPass ID namespace. This structure maps
@@ skipping 38 matching lines @@
   RenderPassList* dest_pass_list_;
 
   // This is the set of aggregated pass ids that are affected by filters that
   // move pixels.
   base::flat_set<int> moved_pixel_passes_;
 
   // This is the set of aggregated pass ids that are drawn by copy requests, so
   // should not have their damage rects clipped to the root damage rect.
   base::flat_set<int> copy_request_passes_;
 
+  // This is the set of aggregated pass ids that are drawn by force render
+  // surface, so should not have their damage rects clipped to the root damage
+  // rect.
+  base::flat_set<int> force_render_surface_passes_;
+
   // This maps each aggregated pass id to the set of (aggregated) pass ids
   // that its RenderPassDrawQuads depend on
   base::flat_map<int, base::flat_set<int>> render_pass_dependencies_;
 
   // The root damage rect of the currently-aggregating frame.
   gfx::Rect root_damage_rect_;
 
   // True if the frame that's currently being aggregated has copy requests.
   // This is valid during Aggregate after PrewalkTree is called.
   bool has_copy_requests_;
 
+  // True if the frame that's currently being aggregated has force render
+  // surface. This is valid during Aggregate after PrewalkTree is called.
+  bool has_force_render_surfaces_;
+
   // Tracks UMA stats for SurfaceDrawQuads during a call to Aggregate().
   SurfaceDrawQuadUmaStats uma_stats_;
 
   base::WeakPtrFactory<SurfaceAggregator> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SurfaceAggregator);
 };
 
 }  // namespace cc
 
 #endif  // CC_SURFACES_SURFACE_AGGREGATOR_H_