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

cc/trees/layer_tree_host.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/layer_tree_host.h"
 
 #include <algorithm>
 #include <stack>
 
 #include "base/bind.h"
@@ skipping 1023 matching lines @@
 
   SetNeedsCommit();
 }
 
 void LayerTreeHost::UpdateTopControlsState(TopControlsState constraints,
                                            TopControlsState current,
                                            bool animate) {
   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,
                  top_controls_manager_weak_ptr_,
                  constraints,
                  current,
                  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;
   return root_layer_->BlocksPendingCommitRecursive();
 }
 
 scoped_ptr<base::Value> LayerTreeHost::AsValue() const {
   scoped_ptr<base::DictionaryValue> state(new base::DictionaryValue());
   state->Set("proxy", proxy_->AsValue().release());
   return state.PassAs<base::Value>();
@@ skipping 18 matching lines @@
     bool start_ready_animations = true;
     (*iter).second->UpdateState(start_ready_animations, NULL);
   }
 }
 
 skia::RefPtr<SkPicture> LayerTreeHost::CapturePicture() {
   return proxy_->CapturePicture();
 }
 
 }  // namespace cc