cc: Start using raster/eviction iterators.

cc/resources/tile_priority_queue.h

+// 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.
+
+#ifndef CC_RESOURCES_TILE_PRIORITY_QUEUE_H_
+#define CC_RESOURCES_TILE_PRIORITY_QUEUE_H_
+
+namespace cc {
+
+class Tile;
+
+class TilePriorityQueue {

[reveman, 2014/07/15 01:51:10]

Do we still need this interface?

[vmpstr, 2014/07/15 05:36:27]

Now that both LTHI and tile manager know about specific types, this can be
removed. I will do that.

[vmpstr, 2014/07/15 17:47:21]

I'm going to keep this for now, and put GetPairedPictureLayers in here.

+ public:
+  virtual void Pop() = 0;
+  virtual bool IsEmpty() = 0;
+  virtual Tile* Top() = 0;
+
+ protected:
+  virtual ~TilePriorityQueue() {}
+};
+
+}  // namespace cc
+
+#endif  // CC_RESOURCES_TILE_PRIORITY_QUEUE_H_