Remove linked_ptr usage in //base.

extensions/browser/guest_view/web_view/web_view_guest_delegate.h

Index: extensions/browser/guest_view/web_view/web_view_guest_delegate.h
diff --git a/extensions/browser/guest_view/web_view/web_view_guest_delegate.h b/extensions/browser/guest_view/web_view/web_view_guest_delegate.h
index afee25935e2da120b42024de48a9920f8adc9adf..7ea61cad14f291f1b2c6402c39f3e0f23ff259d8 100644
--- a/extensions/browser/guest_view/web_view/web_view_guest_delegate.h
+++ b/extensions/browser/guest_view/web_view/web_view_guest_delegate.h
@@ -29,9 +29,6 @@ class WebViewGuestDelegate {
  public :
   virtual ~WebViewGuestDelegate() {}
 
-  typedef std::vector<linked_ptr<api::web_view_internal::ContextMenuItem> >
-      MenuItemVector;
-
   // Called when context menu operation was handled.
   virtual bool HandleContextMenu(const content::ContextMenuParams& params) = 0;
 
@@ -39,12 +36,7 @@ class WebViewGuestDelegate {
   virtual void OnDidInitialize() = 0;
 
   // Shows the context menu for the guest.
-  // |items| acts as a filter. This restricts the current context's default
-  // menu items to contain only the items from |items|.
-  // |items| == NULL means no filtering will be applied.
-  virtual void OnShowContextMenu(
-      int request_id,
-      const MenuItemVector* items) = 0;
+  virtual void OnShowContextMenu(int request_id) = 0;
 
   // Returns true if the WebViewGuest should handle find requests for its
   // embedder.