cc: Don't add new tilings while syncing a tiling.

cc/resources/picture_layer_tiling_set.h

 // Copyright 2012 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_PICTURE_LAYER_TILING_SET_H_
 #define CC_RESOURCES_PICTURE_LAYER_TILING_SET_H_
 
 #include "cc/base/region.h"
 #include "cc/base/scoped_ptr_vector.h"
 #include "cc/resources/picture_layer_tiling.h"
@@ skipping 36 matching lines @@
 
   // Remove all tilings.
   void RemoveAllTilings();
 
   // Remove one tiling.
   void Remove(PictureLayerTiling* tiling);
 
   // Remove all tiles; keep all tilings.
   void RemoveAllTiles();
 
-  void UpdateTilePriorities(WhichTree tree,

[alokp, 2014/06/19 19:32:35]

Dana: I did not understand why you had to remove this and copy the
implementation at two places - PictureLayerImpl and
picture_layer_tiling_unittest.cc.

[danakj, 2014/06/19 21:57:21]

All it is now is a for loop, it used to compute a new visible rect so it had
more purpose. Just simpler to call UTP on the tilings directly, I think esp
since there's only one call site.

-                            const gfx::Rect& visible_layer_rect,
-                            float layer_contents_scale,
-                            double current_frame_time_in_seconds);
-
   void DidBecomeActive();
   void DidBecomeRecycled();
 
   // For a given rect, iterates through tiles that can fill it.  If no
   // set of tiles with resources can fill the rect, then it will iterate
   // through null tiles with valid geometry_rect() until the rect is full.
   // If all tiles have resources, the union of all geometry_rects will
   // exactly fill rect with no overlap.
   class CC_EXPORT CoverageIterator {
    public:
@@ skipping 42 matching lines @@
   gfx::Size layer_bounds_;
   ScopedPtrVector<PictureLayerTiling> tilings_;
 
   friend class Iterator;
   DISALLOW_COPY_AND_ASSIGN(PictureLayerTilingSet);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_PICTURE_LAYER_TILING_SET_H_