cc: Remove map lookup from RenderSurfaceImpl::EffectTreeIndex

cc/layers/render_surface_impl.h

 // Copyright 2011 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_LAYERS_RENDER_SURFACE_IMPL_H_
 #define CC_LAYERS_RENDER_SURFACE_IMPL_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 134 matching lines @@
 
   DamageTracker* damage_tracker() const { return damage_tracker_.get(); }
 
   RenderPassId GetRenderPassId();
 
   void AppendRenderPasses(RenderPassSink* pass_sink);
   void AppendQuads(RenderPass* render_pass, AppendQuadsData* append_quads_data);
 
   int TransformTreeIndex() const;
   int ClipTreeIndex() const;
+
+  void set_effect_tree_index(int index) { effect_tree_index_ = index; }
   int EffectTreeIndex() const;
 
  private:
   void SetContentRect(const gfx::Rect& content_rect);
   gfx::Rect CalculateClippedAccumulatedContentRect();
 
   const EffectNode* OwningEffectNode() const;
 
   LayerImpl* owning_layer_;
 
   LayerTreeImpl* layer_tree_impl_;
   int stable_effect_id_;
+  int effect_tree_index_;
 
   // Container for properties that render surfaces need to compute before they
   // can be drawn.
   struct DrawProperties {
     DrawProperties();
     ~DrawProperties();
 
     float draw_opacity;
 
     // Transforms from the surface's own space to the space of its target
@@ skipping 34 matching lines @@
   int target_render_surface_layer_index_history_;
   size_t current_layer_index_history_;
 
   friend class LayerIterator;
 
   DISALLOW_COPY_AND_ASSIGN(RenderSurfaceImpl);
 };
 
 }  // namespace cc
 #endif  // CC_LAYERS_RENDER_SURFACE_IMPL_H_