cc: Switch to Chromium DCHECKs and LOGs

cc/TreeSynchronizer.cpp

 // 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 "config.h"
 
 #include "TreeSynchronizer.h"
 
 #include "CCLayerImpl.h"
 #include "CCScrollbarAnimationController.h"
@@ skipping 80 matching lines @@
 
     const std::vector<scoped_refptr<LayerChromium> >& children = layer->children();
     for (size_t i = 0; i < children.size(); ++i)
         updateScrollbarLayerPointersRecursive(newLayers, children[i].get());
 
     ScrollbarLayerChromium* scrollbarLayer = layer->toScrollbarLayerChromium();
     if (!scrollbarLayer)
         return;
 
     CCScrollbarLayerImpl* ccScrollbarLayerImpl = static_cast<CCScrollbarLayerImpl*>(newLayers.get(scrollbarLayer->id()));
-    ASSERT(ccScrollbarLayerImpl);
+    DCHECK(ccScrollbarLayerImpl);
     CCLayerImpl* ccScrollLayerImpl = newLayers.get(scrollbarLayer->scrollLayerId());
-    ASSERT(ccScrollLayerImpl);
+    DCHECK(ccScrollLayerImpl);
 
     if (ccScrollbarLayerImpl->orientation() == WebKit::WebScrollbar::Horizontal)
         ccScrollLayerImpl->setHorizontalScrollbarLayer(ccScrollbarLayerImpl);
     else
         ccScrollLayerImpl->setVerticalScrollbarLayer(ccScrollbarLayerImpl);
 }
 
 } // namespace cc