Wrap MSVC-specific pragmas. As -Wunknown-pragmas has been disabled for wtf,...

webkit/glue/stacking_order_iterator.cc

 // Copyright (c) 2006-2008 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 "base/compiler_specific.h"
 
-#pragma warning(push, 0)
+MSVC_PUSH_WARNING_LEVEL(0);
 #include "RenderLayer.h"
 #include "RenderObject.h"
-#pragma warning(pop)
+MSVC_POP_WARNING();
 #undef LOG
 
 #include "webkit/glue/stacking_order_iterator.h"
 
 //
 // RenderLayerIterator
 //
 
 RenderLayerIterator::RenderLayerIterator() {
 }
@@ skipping 113 matching lines @@
   if (!current_object_) {
     // Start the next layer.
     WebCore::RenderLayer* layer = layer_iterator_.Next();
     if (layer) {
       current_object_ = layer->renderer();
       current_layer_root_ = current_object_;
     }
   }
   return current_object_;
 }