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

cc/tiles/tiling_set_raster_queue_all.cc

Index: cc/tiles/tiling_set_raster_queue_all.cc
diff --git a/cc/tiles/tiling_set_raster_queue_all.cc b/cc/tiles/tiling_set_raster_queue_all.cc
index adae8a8dfbe8dc14102698fd7fa462c272fce841..f2c19165f7766e7d3b503ccfe7f334999eddf282 100644
--- a/cc/tiles/tiling_set_raster_queue_all.cc
+++ b/cc/tiles/tiling_set_raster_queue_all.cc
@@ -22,8 +22,11 @@ TilingSetRasterQueueAll::IterationStage::IterationStage(
 
 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.