GuestView: Use Weak Pointers Throughout

extensions/browser/guest_view/guest_view_base.h

 // Copyright 2014 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 EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_
 
 #include <queue>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 167 matching lines @@
 
   bool IsViewType(const char* const view_type) const {
     return !strcmp(GetViewType(), view_type);
   }
 
   // Toggles autosize mode for this GuestView.
   void SetAutoSize(bool enabled,
                    const gfx::Size& min_size,
                    const gfx::Size& max_size);
 
-  base::WeakPtr<GuestViewBase> AsWeakPtr();
-
   bool initialized() const { return initialized_; }
 
   content::WebContents* embedder_web_contents() const {
     return embedder_web_contents_;
   }
 
   // Returns the parameters associated with the element hosting this GuestView
   // passed in from JavaScript.
   base::DictionaryValue* attach_params() const { return attach_params_.get(); }
 
@@ skipping 143 matching lines @@
   // This is used to ensure pending tasks will not fire after this object is
   // destroyed.
   base::WeakPtrFactory<GuestViewBase> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GuestViewBase);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_