cc: Do not cleanup tiles with raster tasks.

cc/test/fake_picture_layer_tiling_client.cc

Index: cc/test/fake_picture_layer_tiling_client.cc
diff --git a/cc/test/fake_picture_layer_tiling_client.cc b/cc/test/fake_picture_layer_tiling_client.cc
index 7834bc0362774f946a188a638437a8545c51d7d2..e526127567b398542ed9e1f253e5891cb042a4c2 100644
--- a/cc/test/fake_picture_layer_tiling_client.cc
+++ b/cc/test/fake_picture_layer_tiling_client.cc
@@ -79,4 +79,9 @@ const PictureLayerTiling* FakePictureLayerTilingClient::GetTwinTiling(
   return twin_tiling_;
 }
 
+WhichTree FakePictureLayerTilingClient::GetTree() const {
+  // TODO(sohanjg): Find correct tree for test.

[reveman, 2014/07/28 02:24:35]

I don't think this should be a todo. What needs to be done to implement this
properly?

[sohanjg, 2014/07/28 10:10:19]

For getting correct tree we need to set which tree during tests explicitly,
which will involve changing and verifying all tests using
FakePictureLayerTilingClient i.e PictureLayerTiling and PictureLayerTilingSet
tests.
So i thought of doing it as a seperate CL, right after this gets landed.

+  return PENDING_TREE;
+}
+
 }  // namespace cc