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

cc/trees/layer_tree_host.h

Index: cc/trees/layer_tree_host.h
diff --git a/cc/trees/layer_tree_host.h b/cc/trees/layer_tree_host.h
index d6bb16b88c45c1f449a5bcacf75fc2a03ac5043c..549307e8e5340e70ecb7e9cc31f99f6d2c590af0 100644
--- a/cc/trees/layer_tree_host.h
+++ b/cc/trees/layer_tree_host.h
@@ -254,6 +254,9 @@ class CC_EXPORT LayerTreeHost : NON_EXPORTED_BASE(public RateLimiterClient) {
 
   bool in_paint_layer_contents() const { return in_paint_layer_contents_; }
 
+  void ShowTopControls(bool show);
+  float GetTopControlsOffset();
+
  protected:
   LayerTreeHost(LayerTreeHostClient* client, const LayerTreeSettings& settings);
   bool Initialize(scoped_ptr<Thread> impl_thread);