Move content\browser\web_contents to content namespace.

content/browser/web_contents/web_drag_dest_gtk.h

Index: content/browser/web_contents/web_drag_dest_gtk.h
===================================================================
--- content/browser/web_contents/web_drag_dest_gtk.h	(revision 164713)
+++ content/browser/web_contents/web_drag_dest_gtk.h	(working copy)
@@ -42,7 +42,7 @@
   void set_delegate(WebDragDestDelegate* delegate) { delegate_ = delegate; }
 
  private:
-  content::RenderViewHostImpl* GetRenderViewHost() const;
+  RenderViewHostImpl* GetRenderViewHost() const;
 
   // Called when a system drag crosses over the render view. As there is no drag
   // enter event, we treat it as an enter event (and not a regular motion event)