cc: Give non-drawing layers that are rasterized a lower priority.

cc/tiles/tiling_set_raster_queue_all.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/tiles/tiling_set_raster_queue_all.h"
 
 #include <stddef.h>
 
 #include <utility>
 
 #include "cc/tiles/picture_layer_tiling_set.h"
 #include "cc/tiles/tile.h"
 #include "cc/tiles/tile_priority.h"
 
 namespace cc {
 
 TilingSetRasterQueueAll::IterationStage::IterationStage(
     IteratorType type,
     TilePriority::PriorityBin bin)
     : iterator_type(type), tile_type(bin) {
 }
 
 TilingSetRasterQueueAll::TilingSetRasterQueueAll(
     PictureLayerTilingSet* tiling_set,
-    bool prioritize_low_res)
-    : tiling_set_(tiling_set), current_stage_(0) {
+    bool prioritize_low_res,
+    bool is_drawing_layer)
+    : tiling_set_(tiling_set),
+      current_stage_(0),
+      is_drawing_layer_(is_drawing_layer) {
   DCHECK(tiling_set_);
 
   // Early out if the tiling set has no tilings.
   if (!tiling_set_->num_tilings())
     return;
 
   const PictureLayerTilingClient* client = tiling_set->client();
   WhichTree tree = tiling_set->tree();
   // Find high and low res tilings and initialize the iterators.
   PictureLayerTiling* high_res_tiling = nullptr;
@@ skipping 416 matching lines @@
         current_tile_ = PrioritizedTile();
         return *this;
       }
       current_tile_ = *eventually_iterator_;
       break;
   }
   return *this;
 }
 
 }  // namespace cc