Disable translate when there is no API key

chrome/browser/translate/translate_service.cc

 // Copyright 2014 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_service.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_split.h"
@@ skipping 46 matching lines @@
       translate::TranslateDownloadManager::GetInstance();
   if (cleanup_pending_fetcher) {
     download_manager->Shutdown();
   } else {
     // This path is only used by browser tests.
     download_manager->set_request_context(NULL);
   }
 }
 
 // static
 void TranslateService::InitializeForTesting() {

[Takashi Toyoshima, 2015/07/14 12:06:22]

This function is not called for browser tests. So you should call
translate::TranslateManager::SetIgnoreMissingKeyForTesting(true) from
chrome/browser/translate/translate_browsertest.cc.

   if (!g_translate_service) {
     TranslateService::Initialize();
+    translate::TranslateManager::SetIgnoreMissingKeyForTesting(true);
   } else {
     translate::TranslateDownloadManager::GetInstance()->ResetForTesting();
     g_translate_service->OnResourceRequestsAllowed();
   }
 }
 
 // static
 void TranslateService::ShutdownForTesting() {
   translate::TranslateDownloadManager::GetInstance()->Shutdown();
 }
@@ skipping 42 matching lines @@
   // - an FTP page (as FTP pages tend to have long lists of filenames that may
   //   confuse the CLD)
   return !url.is_empty() && !url.SchemeIs(content::kChromeUIScheme) &&
          !url.SchemeIs(content::kChromeDevToolsScheme) &&
 #if defined(OS_CHROMEOS)
          !(url.SchemeIs(extensions::kExtensionScheme) &&
            url.DomainIs(file_manager::kFileManagerAppId)) &&
 #endif
          !url.SchemeIs(url::kFtpScheme);
 }