cc: Add PictureLayerImpl::AsValue

cc/picture_layer_tiling_set.cc

Index: cc/picture_layer_tiling_set.cc
diff --git a/cc/picture_layer_tiling_set.cc b/cc/picture_layer_tiling_set.cc
index d2a53491bcd09fab6385156d0863d883a7854f59..f674e96621aa45d08f4d5e69f8f11575c0170f6f 100644
--- a/cc/picture_layer_tiling_set.cc
+++ b/cc/picture_layer_tiling_set.cc
@@ -300,4 +300,11 @@ void PictureLayerTilingSet::DidBecomeActive() {
     tilings_[i]->DidBecomeActive();
 }
 
+scoped_ptr<base::Value> PictureLayerTilingSet::AsValue() const {
+  scoped_ptr<base::ListValue> state(new base::ListValue());
+  for (size_t i = 0; i < tilings_.size(); ++i)
+    state->Append(tilings_[i]->AsValue().release());
+  return state.PassAs<base::Value>();
+}
+
 }  // namespace cc