Make RenderObject non-copyable.

Important since pointers been replaced with references.

BUG=

Review URL: https://codereview.chromium.org/184673002

git-svn-id: svn://svn.chromium.org/blink/trunk@168157 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/core/rendering/RenderObject.h

@@ -137,6 +137,7 @@ class RenderObject : public ImageResourceClient {
     friend class RenderLayerReflectionInfo; // For setParent
     friend class RenderLayerScrollableArea; // For setParent.
     friend class RenderObjectChildList;
+    WTF_MAKE_NONCOPYABLE(RenderObject);
 public:
     // Anonymous objects should pass the document as their node, and they will then automatically be
     // marked as anonymous in the constructor.