Delete the temporary file when generating MHTML with the extension API.

chrome/browser/extensions/extension_save_page_api.h

 // Copyright (c) 2011 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 CHROME_BROWSER_EXTENSIONS_EXTENSION_SAVE_PAGE_API_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_SAVE_PAGE_API_H_
 
 #include <string>
 
+#include "base/memory/ref_counted.h"
 #include "chrome/browser/extensions/extension_function.h"
 #include "content/browser/tab_contents/tab_contents_observer.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
+#include "webkit/blob/deletable_file_reference.h"
 
 class SavePageAsMHTMLFunction : public AsyncExtensionFunction,
                                 public content::NotificationObserver {
  public:
   SavePageAsMHTMLFunction();
 
  private:
   virtual ~SavePageAsMHTMLFunction();
 
   virtual bool RunImpl() OVERRIDE;
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
+  virtual bool OnMessageReceivedFromRenderView(
+      const IPC::Message& message) OVERRIDE;
 
   // Called on the file thread.
   void CreateTemporaryFile();
 
   // Called on the UI thread.
   void TemporaryFileCreated(bool success);
   void ReturnFailure(const std::string& error);
   void ReturnSuccess(int64 file_size);
 
+  // Returns the TabContents we are associated with, NULL if it's been closed.
+  TabContents* GetTabContents();
+
   int tab_id_;
 
   // The path to the temporary file containing the MHTML data.
   FilePath mhtml_path_;
 
+  // The file containing the MHTML.
+  scoped_refptr<webkit_blob::DeletableFileReference> mhtml_file_;
+
   content::NotificationRegistrar registrar_;
+
   DECLARE_EXTENSION_FUNCTION_NAME("experimental.savePage.saveAsMHTML")
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_SAVE_PAGE_API_H_