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 1030 matching lines @@
 
   // 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(
+    bool show) {
+  if (!settings_.calculate_top_controls_position)
+    return;
+  proxy_->ImplThread()->PostTask(
+      base::Bind(
+          &TopControlsManager::UpdateTopControlsStatePreservingConstraints,
+          top_controls_manager_weak_ptr_,
+          show ? cc::SHOWN : cc::HIDDEN,
+          true));
+}
+
 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