cc: Simplify the logic for deciding to update tile priorities.

cc/trees/layer_tree_host_common.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_TREES_LAYER_TREE_HOST_COMMON_H_
 #define CC_TREES_LAYER_TREE_HOST_COMMON_H_
 
 #include <vector>
 
 #include "base/memory/ref_counted.h"
@@ skipping 23 matching lines @@
       int max_texture_size,
       bool can_use_lcd_text,
       LayerList* render_surface_layer_list);
   static void CalculateDrawProperties(
       LayerImpl* root_layer,
       gfx::Size device_viewport_size,
       float device_scale_factor,
       float page_scale_factor,
       int max_texture_size,
       bool can_use_lcd_text,
-      LayerImplList* render_surface_layer_list,
-      bool update_tile_priorities);
+      LayerImplList* render_surface_layer_list);
 
   // Performs hit testing for a given render_surface_layer_list.
   static LayerImpl* FindLayerThatIsHitByPoint(
       gfx::PointF screen_space_point,
       const LayerImplList& render_surface_layer_list);
 
   static LayerImpl* FindLayerThatIsHitByPointInTouchHandlerRegion(
       gfx::PointF screen_space_point,
       const LayerImplList& render_surface_layer_list);
 
@@ skipping 88 matching lines @@
 
   for (size_t i = 0; i < root_layer->children().size(); ++i) {
     CallFunctionForSubtree<Function>(
         get_child_as_raw_ptr(root_layer->children(), i));
   }
 }
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_COMMON_H_