Start moving context menu code to RenderFrame.

content/port/browser/render_view_host_delegate_view.h

Index: content/port/browser/render_view_host_delegate_view.h
===================================================================
--- content/port/browser/render_view_host_delegate_view.h	(revision 247964)
+++ content/port/browser/render_view_host_delegate_view.h	(working copy)
@@ -21,6 +21,7 @@
 }
 
 namespace content {
+class RenderFrameHost;
 struct ContextMenuParams;
 struct DropData;
 struct MenuItem;
@@ -32,7 +33,8 @@
  public:
   // A context menu should be shown, to be built using the context information
   // provided in the supplied params.
-  virtual void ShowContextMenu(const ContextMenuParams& params) {}
+  virtual void ShowContextMenu(RenderFrameHost* render_frame_host,
+                               const ContextMenuParams& params) {}
 
   // Shows a popup menu with the specified items.
   // This method should call RenderViewHost::DidSelectPopupMenuItem[s]() or