Clean up TranslateManager's URL fetchers so that they are destroyed in the correct thread.

chrome/browser/translate/translate_manager.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/translate/translate_manager.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/memory/singleton.h"
 #include "base/metrics/histogram.h"
@@ skipping 66 matching lines @@
 // before attempting a translation.
 const int kTranslateLoadCheckDelayMs = 150;
 
 // The maximum number of attempts we'll do to see if the page has finshed
 // loading before giving up the translation
 const int kMaxTranslateLoadCheckAttempts = 20;
 
 }  // namespace
 
 TranslateManager::~TranslateManager() {
+  // CleanupPendingUrlFetcher should be called ahead of destructing.
+  DCHECK(language_list_.get() == NULL);
+  DCHECK(script_.get() == NULL);
+
   weak_method_factory_.InvalidateWeakPtrs();
 }
 
 // static
 TranslateManager* TranslateManager::GetInstance() {
   return Singleton<TranslateManager>::get();
 }
 
 // static
 bool TranslateManager::IsTranslatableURL(const GURL& url) {
@@ skipping 530 matching lines @@
       (prefs != NULL && !prefs->GetBoolean(prefs::kEnableTranslate))) {
     return;
   }
 
   if (language_list_.get())
     language_list_->RequestLanguageList();
   else
     NOTREACHED();
 }
 
-void TranslateManager::CleanupPendingUlrFetcher() {
+void TranslateManager::CleanupPendingUrlFetcher() {
   language_list_.reset();
   script_.reset();
 }
 
 void TranslateManager::OnTranslateScriptFetchComplete(
     bool success, const std::string& data) {
   std::vector<PendingRequest>::const_iterator iter;
   for (iter = pending_requests_.begin(); iter != pending_requests_.end();
        ++iter) {
     const PendingRequest& request = *iter;
@@ skipping 69 matching lines @@
   // so we are more aggressive about showing the shortcut to never translate.
   #if defined(OS_ANDROID)
   config.never_translate_min_count = 1;
   #else
   config.never_translate_min_count = 3;
   #endif  // defined(OS_ANDROID)
 
   config.always_translate_min_count = 3;
   return config;
 }