cc: Move pre-decodes to background worker.

cc/test/fake_layer_tree_host_impl_client.cc

Index: cc/test/fake_layer_tree_host_impl_client.cc
diff --git a/cc/test/fake_layer_tree_host_impl_client.cc b/cc/test/fake_layer_tree_host_impl_client.cc
index 3b7adfcd8fb303736d9a6056867a251aa992540d..b37a5e6dc2102d3e2718cf05d6e006c90577420e 100644
--- a/cc/test/fake_layer_tree_host_impl_client.cc
+++ b/cc/test/fake_layer_tree_host_impl_client.cc
@@ -18,4 +18,12 @@ void FakeLayerTreeHostImplClient::NeedsImplSideInvalidation() {
   did_request_impl_side_invalidation_ = true;
 }
 
+void FakeLayerTreeHostImplClient::NotifyReadyToActivate() {
+  ready_to_activate_ = true;
+}
+
+void FakeLayerTreeHostImplClient::NotifyReadyToDraw() {
+  ready_to_draw_ = true;
+}
+
 }  // namespace cc