Fix RenderWidgetHostViewGuest leak.

content/browser/web_contents/web_contents_view_mac.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_MAC_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include <string>
@@ skipping 64 matching lines @@
   virtual void SetInitialFocus() override;
   virtual void StoreFocus() override;
   virtual void RestoreFocus() override;
   virtual DropData* GetDropData() const override;
   virtual gfx::Rect GetViewBounds() const override;
   virtual void SetAllowOtherViews(bool allow) override;
   virtual bool GetAllowOtherViews() const override;
   virtual void CreateView(
       const gfx::Size& initial_size, gfx::NativeView context) override;
   virtual RenderWidgetHostViewBase* CreateViewForWidget(
-      RenderWidgetHost* render_widget_host) override;
+      RenderWidgetHost* render_widget_host, bool is_guest_view_hack) override;
   virtual RenderWidgetHostViewBase* CreateViewForPopupWidget(
       RenderWidgetHost* render_widget_host) override;
   virtual void SetPageTitle(const base::string16& title) override;
   virtual void RenderViewCreated(RenderViewHost* host) override;
   virtual void RenderViewSwappedIn(RenderViewHost* host) override;
   virtual void SetOverscrollControllerEnabled(bool enabled) override;
   virtual bool IsEventTracking() const override;
   virtual void CloseTabAfterEventTracking() override;
 
   // Backend implementation of RenderViewHostDelegateView.
@@ skipping 42 matching lines @@
   bool allow_other_views_;
 
   scoped_ptr<PopupMenuHelper> popup_menu_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsViewMac);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_MAC_H_