cc: Use visible_rect_for_tile_priority_ where approriate

cc/trees/layer_tree_impl.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_impl.h"
 
 #include <limits>
 #include <set>
 
 #include "base/debug/trace_event.h"
@@ skipping 455 matching lines @@
 
   {
     TRACE_EVENT2("cc",
                  "LayerTreeImpl::UpdateDrawProperties",
                  "IsActive",
                  IsActiveTree(),
                  "SourceFrameNumber",
                  source_frame_number_);
     LayerImpl* page_scale_layer =
         page_scale_layer_ ? page_scale_layer_ : InnerViewportContainerLayer();
-    bool can_render_to_separate_surface =
-        (layer_tree_host_impl_->GetDrawMode() !=
-         DRAW_MODE_RESOURCELESS_SOFTWARE);
+    bool can_render_to_separate_surface = !resourceless_software_draw();
 
     ++render_surface_layer_list_id_;
     LayerTreeHostCommon::CalcDrawPropsImplInputs inputs(
         root_layer(),
         DrawViewportSize(),
         layer_tree_host_impl_->DrawTransform(),
         device_scale_factor(),
         total_page_scale_factor(),
         page_scale_layer,
         resource_provider()->max_texture_size(),
@@ skipping 213 matching lines @@
 }
 
 PaintTimeCounter* LayerTreeImpl::paint_time_counter() const {
   return layer_tree_host_impl_->paint_time_counter();
 }
 
 MemoryHistory* LayerTreeImpl::memory_history() const {
   return layer_tree_host_impl_->memory_history();
 }
 
+bool LayerTreeImpl::resourceless_software_draw() const {
+  return layer_tree_host_impl_->GetDrawMode() ==
+         DRAW_MODE_RESOURCELESS_SOFTWARE;
+}
+
 gfx::Size LayerTreeImpl::device_viewport_size() const {
   return layer_tree_host_impl_->device_viewport_size();
 }
 
 bool LayerTreeImpl::IsActiveTree() const {
   return layer_tree_host_impl_->active_tree() == this;
 }
 
 bool LayerTreeImpl::IsPendingTree() const {
   return layer_tree_host_impl_->pending_tree() == this;
@@ skipping 721 matching lines @@
 
 void LayerTreeImpl::InputScrollAnimationFinished() {
   layer_tree_host_impl_->ScrollEnd();
 }
 
 BlockingTaskRunner* LayerTreeImpl::BlockingMainThreadTaskRunner() const {
   return proxy()->blocking_main_thread_task_runner();
 }
 
 }  // namespace cc