cc: Avoid expensive RenderingStats collection.

cc/skpicture_content_layer_updater.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/skpicture_content_layer_updater.h"
 
 #include "base/debug/trace_event.h"
 #include "cc/layer_painter.h"
 #include "cc/prioritized_resource.h"
 #include "cc/resource_update_queue.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 
 namespace cc {
 
 SkPictureContentLayerUpdater::Resource::Resource(SkPictureContentLayerUpdater* updater, scoped_ptr<PrioritizedResource> texture)
     : LayerUpdater::Resource(texture.Pass())
     , m_updater(updater)
 {
 }
 
 SkPictureContentLayerUpdater::Resource::~Resource()
 {
 }
 
-void SkPictureContentLayerUpdater::Resource::update(ResourceUpdateQueue& queue, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate, RenderingStats&)
+void SkPictureContentLayerUpdater::Resource::update(ResourceUpdateQueue& queue, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate, RenderingStats*)
 {
     updater()->updateTexture(queue, texture(), sourceRect, destOffset, partialUpdate);
 }
 
 SkPictureContentLayerUpdater::SkPictureContentLayerUpdater(scoped_ptr<LayerPainter> painter)
     : ContentLayerUpdater(painter.Pass())
     , m_layerIsOpaque(false)
 {
 }
 
 SkPictureContentLayerUpdater::~SkPictureContentLayerUpdater()
 {
 }
 
 scoped_refptr<SkPictureContentLayerUpdater> SkPictureContentLayerUpdater::create(scoped_ptr<LayerPainter> painter)
 {
     return make_scoped_refptr(new SkPictureContentLayerUpdater(painter.Pass()));
 }
 
 scoped_ptr<LayerUpdater::Resource> SkPictureContentLayerUpdater::createResource(PrioritizedResourceManager* manager)
 {
     return scoped_ptr<LayerUpdater::Resource>(new Resource(this, PrioritizedResource::create(manager)));
 }
 
-void SkPictureContentLayerUpdater::prepareToUpdate(const gfx::Rect& contentRect, const gfx::Size&, float contentsWidthScale, float contentsHeightScale, gfx::Rect& resultingOpaqueRect, RenderingStats& stats)
+void SkPictureContentLayerUpdater::prepareToUpdate(const gfx::Rect& contentRect, const gfx::Size&, float contentsWidthScale, float contentsHeightScale, gfx::Rect& resultingOpaqueRect, RenderingStats* stats)
 {
     SkCanvas* canvas = m_picture.beginRecording(contentRect.width(), contentRect.height());
     paintContents(canvas, contentRect, contentsWidthScale, contentsHeightScale, resultingOpaqueRect, stats);
     m_picture.endRecording();
 }
 
 void SkPictureContentLayerUpdater::drawPicture(SkCanvas* canvas)
 {
     TRACE_EVENT0("cc", "SkPictureContentLayerUpdater::drawPicture");
     canvas->drawPicture(m_picture);
 }
 
 void SkPictureContentLayerUpdater::updateTexture(ResourceUpdateQueue& queue, PrioritizedResource* texture, const gfx::Rect& sourceRect, const gfx::Vector2d& destOffset, bool partialUpdate)
 {
     ResourceUpdate upload = ResourceUpdate::CreateFromPicture(
         texture, &m_picture, contentRect(), sourceRect, destOffset);
     if (partialUpdate)
         queue.appendPartialUpload(upload);
     else
         queue.appendFullUpload(upload);
 }
 
 void SkPictureContentLayerUpdater::setOpaque(bool opaque)
 {
     m_layerIsOpaque = opaque;
 }
 
 }  // namespace cc