Notify main-thread of top controls state changes

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 <string>
 
@@ skipping 650 matching lines @@
 
 void LayerTreeHost::SetViewportSize(const gfx::Size& device_viewport_size) {
   if (device_viewport_size == device_viewport_size_)
     return;
 
   device_viewport_size_ = device_viewport_size;
 
   SetNeedsCommit();
 }
 
-void LayerTreeHost::SetTopControlsShrinkBlinkSize(bool shrink) {
-  if (top_controls_shrink_blink_size_ == shrink)
+void LayerTreeHost::SetTopControlsHeight(float height, bool shrink) {
+  if (top_controls_height_ == height &&
+      top_controls_shrink_blink_size_ == shrink)
     return;
 
+  top_controls_height_ = height;
   top_controls_shrink_blink_size_ = shrink;
   SetNeedsCommit();
 }
 
-void LayerTreeHost::SetTopControlsHeight(float height) {
-  if (top_controls_height_ == height)
-    return;
-
-  top_controls_height_ = height;
-  SetNeedsCommit();
-}
-
 void LayerTreeHost::SetTopControlsShownRatio(float ratio) {
   if (top_controls_shown_ratio_ == ratio)
     return;
 
   top_controls_shown_ratio_ = ratio;
   SetNeedsCommit();
 }
 
 void LayerTreeHost::ApplyPageScaleDeltaFromImplSide(float page_scale_delta) {
   DCHECK(CommitRequested());
@@ skipping 639 matching lines @@
     bool children_need_begin_frames) const {
   proxy_->SetChildrenNeedBeginFrames(children_need_begin_frames);
 }
 
 void LayerTreeHost::SendBeginFramesToChildren(
     const BeginFrameArgs& args) const {
   client_->SendBeginFramesToChildren(args);
 }
 
 }  // namespace cc