Remove the flag to disable new hotwording.

chrome/browser/search/hotword_service_unittest.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 "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/field_trial.h"
 #include "base/prefs/pref_service.h"
 #include "base/test/test_simple_task_runner.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 115 matching lines @@
 #if defined(OS_CHROMEOS)
         // On ChromeOS locale is per-profile.
     profile->GetPrefs()->SetString(prefs::kApplicationLocale, new_locale);
 #else
     g_browser_process->SetApplicationLocale(new_locale);
 #endif
   }
 
   void SetUp() override {
     extension_id_ = GetParam();
-    if (extension_id_ == extension_misc::kHotwordExtensionId) {
-      base::CommandLine::ForCurrentProcess()->AppendSwitch(
-          switches::kDisableExperimentalHotwording);
-    }
 #if defined(OS_CHROMEOS)
     // Tests on chromeos need to have the handler initialized.
     chromeos::CrasAudioHandler::InitializeForTesting();
 #endif
 
     extensions::ExtensionServiceTestBase::SetUp();
   }
 
   void TearDown() override {
 #if defined(OS_CHROMEOS)
     DCHECK(chromeos::CrasAudioHandler::IsInitialized());
     chromeos::CrasAudioHandler::Shutdown();
 #endif
   }
 
   base::FieldTrialList field_trial_list_;
   std::string extension_id_;
 };
 
 INSTANTIATE_TEST_CASE_P(HotwordServiceTests,
                         HotwordServiceTest,
                         ::testing::Values(
-                            extension_misc::kHotwordExtensionId,
                             extension_misc::kHotwordSharedModuleId));
 
 TEST_P(HotwordServiceTest, IsHotwordAllowedDisabledFieldTrial) {
   TestingProfile::Builder profile_builder;
   scoped_ptr<TestingProfile> profile = profile_builder.Build();
 
   // Check that the service exists so that a NULL service be ruled out in
   // following tests.
   HotwordService* hotword_service =
       HotwordServiceFactory::GetForProfile(profile.get());
@@ skipping 382 matching lines @@
   EXPECT_EQ(1, audio_history_handler->GetAudioHistoryCalls());
   // We expect the next check for audio history to be in the queue.
   EXPECT_EQ(base::TimeDelta::FromDays(1),
             test_task_runner->NextPendingTaskDelay());
   EXPECT_TRUE(test_task_runner->HasPendingTask());
   test_task_runner->RunPendingTasks();
   EXPECT_EQ(2, audio_history_handler->GetAudioHistoryCalls());
   EXPECT_TRUE(test_task_runner->HasPendingTask());
   test_task_runner->ClearPendingTasks();
 }