cc: Remove tile ref counting in tile manager.

cc/resources/tile.h

Index: cc/resources/tile.h
diff --git a/cc/resources/tile.h b/cc/resources/tile.h
index 497aff71de8cca4b3ed377d6d3dd8e1bf9598730..4920516f07b4b799d8359aae7aaf0bf64b645bed 100644
--- a/cc/resources/tile.h
+++ b/cc/resources/tile.h
@@ -32,6 +32,10 @@ class CC_EXPORT Tile : public base::RefCounted<Tile> {
        int source_frame_number,
        bool can_use_lcd_text);
 
+  uint64 id() const {
+    return id_;
+  }
+
   PicturePileImpl* picture_pile() {
     return picture_pile_.get();
   }
@@ -151,6 +155,8 @@ class CC_EXPORT Tile : public base::RefCounted<Tile> {
   int layer_id_;
   int source_frame_number_;
   bool can_use_lcd_text_;

[reveman, 2013/07/03 00:32:47]

nit: maybe a blank line here.

[vmpstr, 2013/07/03 19:08:04]

Done.

+  uint64 id_;
+  static uint64 s_next_id_;
 
   DISALLOW_COPY_AND_ASSIGN(Tile);
 };