Change the return type of WTF::bind() to |OwnPtr<Function>|

Source/core/html/canvas/CanvasRenderingContext2D.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  * Copyright (C) 2012, 2013 Intel Corporation. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
  *
@@ skipping 1621 matching lines @@
     c->restore();
 }
 
 bool CanvasRenderingContext2D::rectContainsTransformedRect(const FloatRect& rect, const FloatRect& transformedRect) const
 {
     FloatQuad quad(rect);
     FloatQuad transformedQuad(transformedRect);
     return state().m_transform.mapQuad(quad).containsQuad(transformedQuad);
 }
 
-void CanvasRenderingContext2D::fullCanvasCompositedDraw(const Closure& draw)
+void CanvasRenderingContext2D::fullCanvasCompositedDraw(PassOwnPtr<Closure> draw)
 {
     ASSERT(isFullCanvasCompositeMode(state().m_globalComposite));
 
     GraphicsContext* c = drawingContext();
     ASSERT(c);
 
     CompositeOperator previousOperator = c->compositeOperation();
     if (shouldDrawShadows()) {
         // unroll into two independently composited passes if drawing shadows
         c->beginLayer(1, state().m_globalComposite);
         c->setCompositeOperation(CompositeSourceOver);
         applyShadow(DrawShadowOnly);
-        draw();
+        (*draw)();
         c->setCompositeOperation(previousOperator);
         c->endLayer();
     }
 
     c->beginLayer(1, state().m_globalComposite);
     c->clearShadow();
     c->setCompositeOperation(CompositeSourceOver);
-    draw();
+    (*draw)();
     c->setCompositeOperation(previousOperator);
     c->endLayer();
     applyShadow(DrawShadowAndForeground); // go back to normal shadows mode
 }
 
 PassRefPtrWillBeRawPtr<CanvasGradient> CanvasRenderingContext2D::createLinearGradient(float x0, float y0, float x1, float y1)
 {
     RefPtrWillBeRawPtr<CanvasGradient> gradient = CanvasGradient::create(FloatPoint(x0, y0), FloatPoint(x1, y1));
     return gradient.release();
 }
@@ skipping 774 matching lines @@
 
 unsigned CanvasRenderingContext2D::hitRegionsCount() const
 {
     if (m_hitRegionManager)
         return m_hitRegionManager->getHitRegionsCount();
 
     return 0;
 }
 
 } // namespace blink