cc: Keep tile eviction prioritization consistent with raster priorities.

cc/tiles/tiling_set_eviction_queue.h

Index: cc/tiles/tiling_set_eviction_queue.h
diff --git a/cc/tiles/tiling_set_eviction_queue.h b/cc/tiles/tiling_set_eviction_queue.h
index e6055e5cd33477e61f3541826ade990eb166ca0e..ebd01011c19a5013657d92b70bed7dc9ee90e8ae 100644
--- a/cc/tiles/tiling_set_eviction_queue.h
+++ b/cc/tiles/tiling_set_eviction_queue.h
@@ -67,12 +67,14 @@ namespace cc {
 // with low priority on one tree, but high combined priority.
 class CC_EXPORT TilingSetEvictionQueue {
  public:
-  explicit TilingSetEvictionQueue(PictureLayerTilingSet* tiling_set);
+  explicit TilingSetEvictionQueue(PictureLayerTilingSet* tiling_set,
+                                  bool is_drawing_layer);
   ~TilingSetEvictionQueue();
 
   const PrioritizedTile& Top() const;
   void Pop();
   bool IsEmpty() const;
+  bool is_drawing_layer() const { return is_drawing_layer_; }
 
  private:
   enum Phase {
@@ -198,6 +200,7 @@ class CC_EXPORT TilingSetEvictionQueue {
   SkewportTilingIterator skewport_iterator_;
   PendingVisibleTilingIterator pending_visible_iterator_;
   VisibleTilingIterator visible_iterator_;
+  bool is_drawing_layer_;
 };
 
 }  // namespace cc