cc: Don't swap PictureLayerTilingSet on activate.

cc/resources/tile_manager_unittest.cc

 // Copyright 2013 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/eviction_tile_priority_queue.h"
 #include "cc/resources/raster_tile_priority_queue.h"
 #include "cc/resources/tile.h"
 #include "cc/resources/tile_priority.h"
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
@@ skipping 91 matching lines @@
     LayerTreeImpl* pending_tree = host_impl_.pending_tree();
 
     // Steal from the recycled tree.
     scoped_ptr<LayerImpl> old_pending_root = pending_tree->DetachLayerTree();
     DCHECK_IMPLIES(old_pending_root, old_pending_root->id() == id_);
 
     scoped_ptr<FakePictureLayerImpl> pending_layer;
     if (old_pending_root) {
       pending_layer.reset(
           static_cast<FakePictureLayerImpl*>(old_pending_root.release()));
-      pending_layer->SetRasterSource(pile);
+      pending_layer->SetRasterSourceOnPending(pile, Region());
     } else {
       pending_layer =
           FakePictureLayerImpl::CreateWithRasterSource(pending_tree, id_, pile);
       pending_layer->SetDrawsContent(true);
     }
     // The bounds() just mirror the pile size.
     pending_layer->SetBounds(pending_layer->raster_source()->GetSize());
     pending_tree->SetRootLayer(pending_layer.Pass());
 
     pending_layer_ = static_cast<FakePictureLayerImpl*>(
         host_impl_.pending_tree()->LayerById(id_));
     pending_layer_->DoPostCommitInitializationIfNeeded();
   }
 
-  void CreateHighLowResAndSetAllTilesVisible() {
-    // Active layer must get updated first so pending layer can share from it.
-    active_layer_->CreateDefaultTilingsAndTiles();
-    active_layer_->SetAllTilesVisible();
-    pending_layer_->CreateDefaultTilingsAndTiles();
-    pending_layer_->SetAllTilesVisible();
-  }
-
   TileManager* tile_manager() { return host_impl_.tile_manager(); }
 
  protected:
   GlobalStateThatImpactsTilePriority global_state_;
 
   TestSharedBitmapManager shared_bitmap_manager_;
   TileMemoryLimitPolicy memory_limit_policy_;
   int max_tiles_;
   bool ready_to_activate_;
   int id_;
@@ skipping 723 matching lines @@
     all_tiles.insert(queue.Top());
     ++tile_count;
     queue.Pop();
   }
   EXPECT_EQ(tile_count, all_tiles.size());
   EXPECT_EQ(16u, tile_count);
 }
 
 }  // namespace
 }  // namespace cc