Remove the HANDLED_EXTERNALLY status code.

content/public/browser/resource_controller.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_PUBLIC_BROWSER_RESOURCE_CONTROLLER_H_
 #define CONTENT_PUBLIC_BROWSER_RESOURCE_CONTROLLER_H_
 
 namespace content {
 
 // Used to either resume a deferred resource load or cancel a resource load at
-// any time.
+// any time.  CancelAndIgnore is a variation of Cancel that also causes the
+// requester of the resource to act like the request was never made.
 class ResourceController {
  public:
   virtual void Cancel() = 0;
+  virtual void CancelAndIgnore() = 0;
   virtual void Resume() = 0;
  protected:
   virtual ~ResourceController() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RESOURCE_CONTROLLER_H_