cc: Switch ContentLayerUpdater to use RenderingStatsInstrumentation

cc/layers/scrollbar_layer.cc

 // Copyright 2012 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/scrollbar_layer.h"
 
 #include "base/basictypes.h"
 #include "base/debug/trace_event.h"
 #include "cc/layers/scrollbar_layer_impl.h"
 #include "cc/resources/caching_bitmap_content_layer_updater.h"
@@ skipping 243 matching lines @@
     thumb_.reset();
   }
 
   ContentsScalingLayer::SetLayerTreeHost(host);
 }
 
 void ScrollbarLayer::CreateUpdaterIfNeeded() {
   if (layer_tree_host()->settings().solid_color_scrollbars)
     return;
 
+  printf("ScrollbarLayer::CreateUpdaterIfNeeded\n");
+
   texture_format_ =
       layer_tree_host()->GetRendererCapabilities().best_texture_format;
 
   if (!back_track_updater_) {
     back_track_updater_ = CachingBitmapContentLayerUpdater::Create(
         ScrollbarBackgroundPainter::Create(
             scrollbar_.get(),
             painter_.get(),
             geometry_.get(),
             WebKit::WebScrollbar::BackTrackPart).PassAs<LayerPainter>(),
@@ skipping 161 matching lines @@
                thumb_.get(),
                origin_thumb_rect,
                queue,
                stats);
   }
 
   dirty_rect_ = gfx::RectF();
 }
 
 }  // namespace cc