cc: Switch to Chromium DCHECKs LOGs

cc/layer.h

 // Copyright 2010 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.
 
 #ifndef LayerChromium_h
 #define LayerChromium_h
 
 #include "CCLayerAnimationController.h"
 #include "CCOcclusionTracker.h"
 #include "FloatPoint.h"
@@ skipping 184 matching lines @@
     void clearRenderSurface() { m_renderSurface.reset(); }
     RenderSurfaceChromium* renderSurface() const { return m_renderSurface.get(); }
     void createRenderSurface();
 
     float drawOpacity() const { return m_drawOpacity; }
     void setDrawOpacity(float opacity) { m_drawOpacity = opacity; }
 
     bool drawOpacityIsAnimating() const { return m_drawOpacityIsAnimating; }
     void setDrawOpacityIsAnimating(bool drawOpacityIsAnimating) { m_drawOpacityIsAnimating = drawOpacityIsAnimating; }
 
-    LayerChromium* renderTarget() const { ASSERT(!m_renderTarget || m_renderTarget->renderSurface()); return m_renderTarget; }
+    LayerChromium* renderTarget() const { DCHECK(!m_renderTarget || m_renderTarget->renderSurface()); return m_renderTarget; }
     void setRenderTarget(LayerChromium* target) { m_renderTarget = target; }
 
     bool drawTransformIsAnimating() const { return m_drawTransformIsAnimating; }
     void setDrawTransformIsAnimating(bool animating) { m_drawTransformIsAnimating = animating; }
     bool screenSpaceTransformIsAnimating() const { return m_screenSpaceTransformIsAnimating; }
     void setScreenSpaceTransformIsAnimating(bool animating) { m_screenSpaceTransformIsAnimating = animating; }
 
     // This moves from layer space, with origin in the center to target space with origin in the top left.
     // That is, it converts from logical, non-page-scaled, to target pixels (and if the target is the
     // root render surface, then this converts to physical pixels).
@@ skipping 161 matching lines @@
 
     WebKit::WebAnimationDelegate* m_layerAnimationDelegate;
     WebKit::WebLayerScrollClient* m_layerScrollClient;
 };
 
 void sortLayers(std::vector<scoped_refptr<LayerChromium> >::iterator, std::vector<scoped_refptr<LayerChromium> >::iterator, void*);
 
 }  // namespace cc
 
 #endif