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

cc/trees/layer_tree_host.cc

Index: cc/trees/layer_tree_host.cc
diff --git a/cc/trees/layer_tree_host.cc b/cc/trees/layer_tree_host.cc
index 3bc69bd0db4a4d24bf0e3b70ca896ce7810296bc..0fdc08e837f9bfcbca3220dc077f3223dcc3c8de 100644
--- a/cc/trees/layer_tree_host.cc
+++ b/cc/trees/layer_tree_host.cc
@@ -1041,6 +1041,7 @@ void LayerTreeHost::UpdateTopControlsState(TopControlsState constraints,
   if (!settings_.calculate_top_controls_position)
     return;
 
+  top_controls_constraints_ = constraints;
   // Top controls are only used in threaded mode.
   proxy_->ImplThread()->PostTask(
       base::Bind(&TopControlsManager::UpdateTopControlsState,
@@ -1050,6 +1051,19 @@ void LayerTreeHost::UpdateTopControlsState(TopControlsState constraints,
                  animate));
 }
 
+void LayerTreeHost::UpdateTopControlsStatePreservingConstraints(
+    TopControlsState current,
+    bool animate) {
+  if (!settings_.calculate_top_controls_position)
+    return;
+  if (top_controls_constraints_ < 0)

[jamesr, 2013/06/10 23:48:31]

top_controls_constraints_ is an enum. what does "< 0" mean? that's not a valid
enum value

[Jinsuk Kim, 2013/06/11 04:53:18]

Added cc::NONE value to the enum list.

+    return;
+
+  UpdateTopControlsState(top_controls_constraints_,
+                         current,
+                         animate);
+}
+
 bool LayerTreeHost::BlocksPendingCommit() const {
   if (!root_layer_.get())
     return false;