Refactor MHTMLGenerator to allow getting sending the data to a file descriptor.

content/public/browser/web_contents.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_WEB_CONTENTS_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_
 
 #include <set>
 
 #include "base/basictypes.h"
@@ skipping 334 matching lines @@
                         SavePageType save_type) = 0;
 
   // Saves the given frame's URL to the local filesystem..
   virtual void SaveFrame(const GURL& url,
                          const Referrer& referrer) = 0;
 
   // Generate an MHTML representation of the current page in the given file.
   virtual void GenerateMHTML(
       const base::FilePath& file,
       const base::Callback<void(
-          const base::FilePath& /* path to the MHTML file */,
           int64 /* size of the file */)>& callback) = 0;
 
   // Returns true if the active NavigationEntry's page_id equals page_id.
   virtual bool IsActiveEntry(int32 page_id) = 0;
 
   // Returns the contents MIME type after a navigation.
   virtual const std::string& GetContentsMimeType() const = 0;
 
   // Returns true if this WebContents will notify about disconnection.
   virtual bool WillNotifyDisconnection() const = 0;
@@ skipping 95 matching lines @@
 
  private:
   // This interface should only be implemented inside content.
   friend class WebContentsImpl;
   WebContents() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_H_