Remove scoped_refptr::release which is confusing and causes leaks.

chrome/browser/extensions/api/page_capture/page_capture_api.cc

 // 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.
 
 #include "chrome/browser/extensions/api/page_capture/page_capture_api.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/extension_tab_util.h"
@@ skipping 26 matching lines @@
 
 }  // namespace
 
 static PageCaptureSaveAsMHTMLFunction::TestDelegate* test_delegate_ = NULL;
 
 PageCaptureSaveAsMHTMLFunction::PageCaptureSaveAsMHTMLFunction() {
 }
 
 PageCaptureSaveAsMHTMLFunction::~PageCaptureSaveAsMHTMLFunction() {
   if (mhtml_file_.get()) {
-    BrowserThread::ReleaseSoon(BrowserThread::IO, FROM_HERE,
-                               mhtml_file_.release());
+    webkit_blob::ShareableFileReference* to_release = mhtml_file_.get();
+    to_release->AddRef();
+    mhtml_file_ = NULL;
+    BrowserThread::ReleaseSoon(BrowserThread::IO, FROM_HERE, to_release);
   }
 }
 
 void PageCaptureSaveAsMHTMLFunction::SetTestDelegate(TestDelegate* delegate) {
   test_delegate_ = delegate;
 }
 
 bool PageCaptureSaveAsMHTMLFunction::RunImpl() {
   params_ = SaveAsMHTML::Params::Create(*args_);
   EXTENSION_FUNCTION_VALIDATE(params_.get());
@@ skipping 128 matching lines @@
   Browser* browser = NULL;
   content::WebContents* web_contents = NULL;
 
   if (!ExtensionTabUtil::GetTabById(params_->details.tab_id, profile(),
                                     include_incognito(), &browser, NULL,
                                     &web_contents, NULL)) {
     return NULL;
   }
   return web_contents;
 }