cc: Improve tile deletion and general tile manager performance.

cc/picture_layer_tiling_set_unittest.cc

Index: cc/picture_layer_tiling_set_unittest.cc
diff --git a/cc/picture_layer_tiling_set_unittest.cc b/cc/picture_layer_tiling_set_unittest.cc
index 17affd719ce0027536ebd1ad874bf8d0fa935e14..363ddf15755abdc4938c67589db7b706671dfba3 100644
--- a/cc/picture_layer_tiling_set_unittest.cc
+++ b/cc/picture_layer_tiling_set_unittest.cc
@@ -75,9 +75,9 @@ class PictureLayerTilingSetTestWithResources : public testing::Test {
       PictureLayerTiling* tiling = set.AddTiling(scale);
       std::vector<Tile*> tiles = tiling->AllTilesForTesting();
       for (size_t i = 0; i < tiles.size(); ++i) {
-        EXPECT_FALSE(tiles[i]->ManagedStateForTesting().resource);
+        EXPECT_FALSE(tiles[i]->ManagedStateForTesting()->resource);
 
-        tiles[i]->ManagedStateForTesting().resource =
+        tiles[i]->ManagedStateForTesting()->resource =
             make_scoped_ptr(new ResourcePool::Resource(
                 resource_provider.get(),
                 gfx::Size(1, 1),