Ignore setNeedsDisplay for SolidColorScrollbarLayer

cc/layers/solid_color_scrollbar_layer.cc

 // Copyright 2013 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/layers/solid_color_scrollbar_layer.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/layers/layer_impl.h"
 #include "cc/layers/solid_color_scrollbar_layer_impl.h"
 
@@ skipping 46 matching lines @@
 }
 
 void SolidColorScrollbarLayer::PushScrollClipPropertiesTo(LayerImpl* layer) {
   SolidColorScrollbarLayerImpl* scrollbar_layer =
       static_cast<SolidColorScrollbarLayerImpl*>(layer);
 
   scrollbar_layer->SetScrollLayerById(scroll_layer_id_);
   scrollbar_layer->SetClipLayerById(clip_layer_id_);
 }
 
+void SolidColorScrollbarLayer::SetNeedsDisplayRect(const gfx::RectF&) {
+  // Never needs repaint.
+}
+
 bool SolidColorScrollbarLayer::OpacityCanAnimateOnImplThread() const {
   return true;
 }
 
 int SolidColorScrollbarLayer::ScrollLayerId() const {
   return scroll_layer_id_;
 }
 
 void SolidColorScrollbarLayer::SetScrollLayer(int layer_id) {
   if (layer_id == scroll_layer_id_)
     return;
 
   scroll_layer_id_ = layer_id;
   SetNeedsFullTreeSync();
 }
 
 void SolidColorScrollbarLayer::SetClipLayer(int layer_id) {
   if (layer_id == clip_layer_id_)
     return;
 
   clip_layer_id_ = layer_id;
   SetNeedsFullTreeSync();
 }
 
 ScrollbarOrientation SolidColorScrollbarLayer::orientation() const {
   return orientation_;
 }
 
 }  // namespace cc