Convert //cc from scoped_ptr to std::unique_ptr.

cc/tiles/raster_tile_priority_queue.cc

Index: cc/tiles/raster_tile_priority_queue.cc
diff --git a/cc/tiles/raster_tile_priority_queue.cc b/cc/tiles/raster_tile_priority_queue.cc
index 0b47407411fd67f5a47e91545fdef01a99b9bbca..2c010df0ae5727c955db884b893b2fdca5ab2d4a 100644
--- a/cc/tiles/raster_tile_priority_queue.cc
+++ b/cc/tiles/raster_tile_priority_queue.cc
@@ -10,21 +10,21 @@
 namespace cc {
 
 // static
-scoped_ptr<RasterTilePriorityQueue> RasterTilePriorityQueue::Create(
+std::unique_ptr<RasterTilePriorityQueue> RasterTilePriorityQueue::Create(
     const std::vector<PictureLayerImpl*>& active_layers,
     const std::vector<PictureLayerImpl*>& pending_layers,
     TreePriority tree_priority,
     Type type) {
   switch (type) {
     case Type::ALL: {
-      scoped_ptr<RasterTilePriorityQueueAll> queue(
+      std::unique_ptr<RasterTilePriorityQueueAll> queue(
           new RasterTilePriorityQueueAll);
       queue->Build(active_layers, pending_layers, tree_priority);
       return std::move(queue);
     }
     case Type::REQUIRED_FOR_ACTIVATION:
     case Type::REQUIRED_FOR_DRAW: {
-      scoped_ptr<RasterTilePriorityQueueRequired> queue(
+      std::unique_ptr<RasterTilePriorityQueueRequired> queue(
           new RasterTilePriorityQueueRequired);
       queue->Build(active_layers, pending_layers, type);
       return std::move(queue);