Update cc snapshot to r127918

cc/CCSharedQuadState.cpp

 // 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 "CCSharedQuadState.h"
 
 #include "FloatQuad.h"
 
 namespace WebCore {
 
 PassOwnPtr<CCSharedQuadState> CCSharedQuadState::create(const WebKit::WebTransformationMatrix& quadTransform, const IntRect& visibleContentRect, const IntRect& clippedRectInTarget, float opacity, bool opaque)
 {
     return adoptPtr(new CCSharedQuadState(quadTransform, visibleContentRect, clippedRectInTarget, opacity, opaque));
 }
 
 CCSharedQuadState::CCSharedQuadState(const WebKit::WebTransformationMatrix& quadTransform, const IntRect& visibleContentRect, const IntRect& clippedRectInTarget, float opacity, bool opaque)
     : id(-1)
     , quadTransform(quadTransform)
     , visibleContentRect(visibleContentRect)
     , clippedRectInTarget(clippedRectInTarget)
     , opacity(opacity)
     , opaque(opaque)
 {
 }
 
+PassOwnPtr<CCSharedQuadState> CCSharedQuadState::copy() const
+{
+    OwnPtr<CCSharedQuadState> copiedState(create(quadTransform, visibleContentRect, clippedRectInTarget, opacity, opaque));
+    copiedState->id = id;
+    return copiedState.release();
 }
+
+}