cc: Do not cleanup tiles with raster tasks.

cc/resources/picture_layer_tiling_set_unittest.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_set.h"
 
 #include <map>
 #include <vector>
 
 #include "cc/resources/resource_pool.h"
@@ skipping 55 matching lines @@
         FakeOutputSurface::Create3d();
     CHECK(output_surface->BindToClient(&output_surface_client));
 
     scoped_ptr<SharedBitmapManager> shared_bitmap_manager(
         new TestSharedBitmapManager());
     scoped_ptr<ResourceProvider> resource_provider = ResourceProvider::Create(
         output_surface.get(), shared_bitmap_manager.get(), 0, false, 1, false);
 
     FakePictureLayerTilingClient client(resource_provider.get());
     client.SetTileSize(gfx::Size(256, 256));
+    client.set_tree(PENDING_TREE);
     gfx::Size layer_bounds(1000, 800);
     PictureLayerTilingSet set(&client, layer_bounds);
 
     float scale = min_scale;
     for (int i = 0; i < num_tilings; ++i, scale += scale_increment) {
       PictureLayerTiling* tiling = set.AddTiling(scale);
       tiling->CreateAllTilesForTesting();
       std::vector<Tile*> tiles = tiling->AllTilesForTesting();
       client.tile_manager()->InitializeTilesWithResourcesForTesting(tiles);
     }
@@ skipping 60 matching lines @@
   runTest(10, 1.f, 1.f, 4.5f, 5.f);
 }
 
 class PictureLayerTilingSetSyncTest : public testing::Test {
  public:
   PictureLayerTilingSetSyncTest()
       : tile_size_(gfx::Size(10, 10)),
         source_bounds_(gfx::Size(30, 20)),
         target_bounds_(gfx::Size(30, 30)) {
     source_client_.SetTileSize(tile_size_);
+    source_client_.set_tree(PENDING_TREE);
     target_client_.SetTileSize(tile_size_);
+    target_client_.set_tree(PENDING_TREE);
     source_.reset(new PictureLayerTilingSet(&source_client_, source_bounds_));
     target_.reset(new PictureLayerTilingSet(&target_client_, target_bounds_));
   }
 
   // Sync from source to target.
   void SyncTilings(const gfx::Size& new_bounds,
                    const Region& invalidation,
                    float minimum_scale) {
     for (size_t i = 0; i < source_->num_tilings(); ++i)
       source_->tiling_at(i)->CreateAllTilesForTesting();
@@ skipping 247 matching lines @@
   std::vector<Tile*> new_tiles = target_->tiling_at(0)->AllTilesForTesting();
   for (size_t i = 0; i < original_tiles.size(); ++i) {
     std::vector<Tile*>::iterator find =
         std::find(new_tiles.begin(), new_tiles.end(), original_tiles[i]);
     EXPECT_TRUE(find == new_tiles.end());
   }
 }
 
 }  // namespace
 }  // namespace cc