cc: Reduce surface contents scale adjustments.

cc/trees/layer_tree_host_common.cc

 // 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.
 
 #include "cc/trees/layer_tree_host_common.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 469 matching lines @@
       PropertyTreeBuilder::BuildPropertyTrees(
           inputs->root_layer, inputs->page_scale_layer,
           inputs->inner_viewport_scroll_layer,
           inputs->outer_viewport_scroll_layer,
           inputs->elastic_overscroll_application_layer,
           inputs->elastic_overscroll, inputs->page_scale_factor,
           inputs->device_scale_factor, gfx::Rect(inputs->device_viewport_size),
           inputs->device_transform, inputs->property_trees);
       draw_property_utils::UpdatePropertyTreesAndRenderSurfaces(
           inputs->root_layer, inputs->property_trees,
-          inputs->can_render_to_separate_surface);
+          inputs->can_render_to_separate_surface,
+          inputs->can_adjust_raster_scales);
 
       // Property trees are normally constructed on the main thread and
       // passed to compositor thread. Source to parent updates on them are not
       // allowed in the compositor thread. Some tests build them on the
       // compositor thread, so we need to explicitly disallow source to parent
       // updates when they are built on compositor thread.
       inputs->property_trees->transform_tree
           .set_source_to_parent_updates_allowed(false);
       if (should_measure_property_tree_performance) {
         TRACE_EVENT_END0(
@@ skipping 25 matching lines @@
           gfx::RectF(gfx::SizeF(inputs->device_viewport_size)));
       float page_scale_factor_for_root =
           inputs->page_scale_layer == inputs->root_layer
               ? inputs->page_scale_factor
               : 1.f;
       property_trees->transform_tree.SetRootTransformsAndScales(
           inputs->device_scale_factor, page_scale_factor_for_root,
           inputs->device_transform, inputs->root_layer->position());
       draw_property_utils::UpdatePropertyTreesAndRenderSurfaces(
           inputs->root_layer, inputs->property_trees,
-          inputs->can_render_to_separate_surface);
+          inputs->can_render_to_separate_surface,
+          inputs->can_adjust_raster_scales);
       break;
     }
   }
 
   if (should_measure_property_tree_performance) {
     TRACE_EVENT_BEGIN0(TRACE_DISABLED_BY_DEFAULT("cc.debug.cdp-perf"),
                        "LayerTreeHostCommon::CalculateDrawProperties");
   }
 
   draw_property_utils::FindLayersThatNeedUpdates(
@@ skipping 96 matching lines @@
 
 PropertyTrees* GetPropertyTrees(Layer* layer) {
   return layer->layer_tree_host()->property_trees();
 }
 
 PropertyTrees* GetPropertyTrees(LayerImpl* layer) {
   return layer->layer_tree_impl()->property_trees();
 }
 
 }  // namespace cc