cc: Separate tiling set functionality into explicit separate functions.

cc/resources/picture_layer_tiling.cc

 // 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.
 
 #include "cc/resources/picture_layer_tiling.h"
 
 #include <algorithm>
 #include <cmath>
 #include <limits>
 #include <set>
@@ skipping 834 matching lines @@
   }
 
   // Non-NOW bin tiles are not required or occluded.
   if (tree == PENDING_TREE)
     tile->set_required_for_activation(false);
   else
     tile->set_required_for_draw(false);
   tile->set_is_occluded(tree, false);
 }
 
+void PictureLayerTiling::VerifyAllTilesHaveCurrentRasterSource() const {
+#if DCHECK_IS_ON()
+  for (const auto& tile_pair : tiles_)
+    DCHECK_EQ(raster_source_.get(), tile_pair.second->raster_source());
+#endif
+}
+
 TilePriority PictureLayerTiling::ComputePriorityForTile(
     const Tile* tile) const {
   // TODO(vmpstr): See if this can be moved to iterators.
   TilePriority::PriorityBin max_tile_priority_bin =
       client_->GetMaxTilePriorityBin();
 
   DCHECK_EQ(TileAt(tile->tiling_i_index(), tile->tiling_j_index()), tile);
   gfx::Rect tile_bounds =
       tiling_data_.TileBounds(tile->tiling_i_index(), tile->tiling_j_index());
 
@@ skipping 199 matching lines @@
       break;
   }
 
   gfx::Rect result(origin_x, origin_y, width, height);
   if (cache)
     cache->previous_result = result;
   return result;
 }
 
 }  // namespace cc