cc: Create a Region class that wraps SkRegion, to replace use of WebCore::Region.

cc/quad_culler.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 "config.h"
 
 #include "cc/quad_culler.h"
 
-#include "Region.h"
 #include "cc/append_quads_data.h"
 #include "cc/debug_border_draw_quad.h"
 #include "cc/layer_impl.h"
 #include "cc/occlusion_tracker.h"
 #include "cc/overdraw_metrics.h"
 #include "cc/render_pass.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include <public/WebTransformationMatrix.h>
 
 using namespace std;
@@ skipping 63 matching lines @@
         culledRect = m_occlusionTracker->unoccludedContributingSurfaceContentRect(m_layer, false, drawQuad->quadRect(), &hasOcclusionFromOutsideTargetSurface);
     else
         culledRect = m_occlusionTracker->unoccludedContentRect(m_layer->renderTarget(), drawQuad->quadRect(), drawQuad->quadTransform(), implDrawTransformIsUnknown, drawQuad->clippedRectInTarget(), &hasOcclusionFromOutsideTargetSurface);
 
     appendQuadsData.hadOcclusionFromOutsideTargetSurface |= hasOcclusionFromOutsideTargetSurface;
 
     return appendQuadInternal(drawQuad.Pass(), culledRect, m_quadList, *m_occlusionTracker, m_showCullingWithDebugBorderQuads);
 }
 
 }  // namespace cc