Allows fullscreen to be triggered with the key events used for scrolling.

cc/input/top_controls_manager.cc

Index: cc/input/top_controls_manager.cc
diff --git a/cc/input/top_controls_manager.cc b/cc/input/top_controls_manager.cc
index 1eaedc6a371b20950e528405c8074a7b378472d2..8cec40e33d26e374a2127b7221ed8f5a5424ddf7 100644
--- a/cc/input/top_controls_manager.cc
+++ b/cc/input/top_controls_manager.cc
@@ -55,6 +55,12 @@ TopControlsManager::TopControlsManager(TopControlsManagerClient* client,
 TopControlsManager::~TopControlsManager() {
 }
 
+void TopControlsManager::UpdateTopControlsStatePreservingConstraints(
+    TopControlsState current,
+    bool animate) {
+  UpdateTopControlsState(permitted_state_, current, animate);
+}
+
 void TopControlsManager::UpdateTopControlsState(TopControlsState constraints,
                                                 TopControlsState current,
                                                 bool animate) {