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

chrome/browser/extensions/extension_save_page_api.h

Index: chrome/browser/extensions/extension_save_page_api.h
diff --git a/chrome/browser/extensions/extension_save_page_api.h b/chrome/browser/extensions/extension_save_page_api.h
index 4afdf62f2fcbb8c5c0e1655ed80634d6d134ee41..a37dd714f85d8229d0e8b24a8a29dc8d5762b697 100644
--- a/chrome/browser/extensions/extension_save_page_api.h
+++ b/chrome/browser/extensions/extension_save_page_api.h
@@ -7,10 +7,12 @@
 
 #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 {
@@ -24,6 +26,8 @@ class SavePageAsMHTMLFunction : public AsyncExtensionFunction,
   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();
@@ -33,12 +37,19 @@ class SavePageAsMHTMLFunction : public AsyncExtensionFunction,
   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")
 };