Force use of and cache render surface.

cc/trees/effect_node.h

 // Copyright 2016 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_TREES_EFFECT_NODE_H_
 #define CC_TREES_EFFECT_NODE_H_
 
 #include "cc/base/filter_operations.h"
 #include "cc/cc_export.h"
 #include "third_party/skia/include/core/SkBlendMode.h"
@@ skipping 31 matching lines @@
   FilterOperations background_filters;
   gfx::PointF filters_origin;
 
   SkBlendMode blend_mode;
 
   gfx::Vector2dF surface_contents_scale;
 
   gfx::Size unscaled_mask_target_size;
 
   bool has_render_surface : 1;
+  bool cache_render_surface : 1;
   bool has_copy_request : 1;
   bool hidden_by_backface_visibility : 1;
   bool double_sided : 1;
   bool is_drawn : 1;
   // TODO(jaydasika) : Delete this after implementation of
   // SetHideLayerAndSubtree is cleaned up. (crbug.com/595843)
   bool subtree_hidden : 1;
   // Whether this node has a potentially running (i.e., irrespective
   // of exact timeline) filter animation.
   bool has_potential_filter_animation : 1;
@@ skipping 14 matching lines @@
   // The clip node index of the clip to apply to this effect node's
   // content when rendering to a surface.
   int clip_id;
 
   // This is the id of the ancestor effect node that induces a
   // RenderSurfaceImpl.
   int target_id;
   // The layer id of the mask layer, if any, to apply to this effect
   // node's content when rendering to a surface.
   int mask_layer_id;
+  int closest_ancestor_with_cached_render_surface_id;
   int closest_ancestor_with_copy_request_id;
 
   bool operator==(const EffectNode& other) const;
 
   void AsValueInto(base::trace_event::TracedValue* value) const;
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_EFFECT_NODE_H_