cc: Remove map lookup from RenderSurfaceImpl::EffectTreeIndex

cc/trees/property_tree_builder.cc

 // 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.
 
 #include "cc/trees/property_tree_builder.h"
 
 #include <stddef.h>
 
 #include <map>
 #include <set>
@@ skipping 1358 matching lines @@
         property_trees, overscroll_elasticity_layer, elastic_overscroll);
     property_trees->clip_tree.SetViewportClip(gfx::RectF(viewport));
     float page_scale_factor_for_root =
         page_scale_layer == root_layer ? page_scale_factor : 1.f;
     property_trees->transform_tree.SetRootTransformsAndScales(
         device_scale_factor, page_scale_factor_for_root, device_transform,
         root_layer->position());
     return;
   }
 
-  property_trees->sequence_number++;
-
   DataForRecursion<LayerType> data_for_recursion;
   data_for_recursion.property_trees = property_trees;
   data_for_recursion.transform_tree_parent = nullptr;
   data_for_recursion.transform_fixed_parent = nullptr;
   data_for_recursion.render_target = kRootPropertyTreeNodeId;
   data_for_recursion.clip_tree_parent = kRootPropertyTreeNodeId;
   data_for_recursion.effect_tree_parent = kInvalidPropertyTreeNodeId;
   data_for_recursion.scroll_tree_parent = kRootPropertyTreeNodeId;
   data_for_recursion.page_scale_layer = page_scale_layer;
   data_for_recursion.inner_viewport_scroll_layer = inner_viewport_scroll_layer;
@@ skipping 113 matching lines @@
     color = SkColorSetA(color, 255);
   BuildPropertyTreesTopLevelInternal(
       root_layer, page_scale_layer, inner_viewport_scroll_layer,
       outer_viewport_scroll_layer, overscroll_elasticity_layer,
       elastic_overscroll, page_scale_factor, device_scale_factor, viewport,
       device_transform, property_trees, color);
   property_trees->ResetCachedData();
 }
 
 }  // namespace cc