PassSwapPromises  372 cc/trees/layer_tree_host.cc   sync_tree->PassSwapPromises(&swap_promise_list_);
PassSwapPromises  196 cc/trees/layer_tree_impl.cc   target_tree->PassSwapPromises(&swap_promise_list_);
PassSwapPromises  229 cc/trees/layer_tree_impl.h   void PassSwapPromises(ScopedPtrVector<SwapPromise>* new_swap_promise);