[Hotword] Reverse the experimental flag so that it is on by default.

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 "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/extension_service_test_base.h"
@@ skipping 77 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::kHotwordSharedModuleId) {
+    if (extension_id_ == extension_misc::kHotwordExtensionId) {
       base::CommandLine::ForCurrentProcess()->AppendSwitch(
-          switches::kEnableExperimentalHotwording);
+          switches::kDisableExperimentalHotwording);
     }
 
     extensions::ExtensionServiceTestBase::SetUp();
   }
 
   base::FieldTrialList field_trial_list_;
   std::string extension_id_;
 };
 
 INSTANTIATE_TEST_CASE_P(HotwordServiceTests,
@@ skipping 382 matching lines @@
 
   // Set pref.
   profile()->GetPrefs()->SetBoolean(prefs::kHotwordSearchEnabled, true);
   EXPECT_FALSE(hotword_service->IsSometimesOnEnabled());
 
   // Disable always-on.
   profile()->GetPrefs()->SetBoolean(prefs::kHotwordAlwaysOnSearchEnabled,
                                     false);
   EXPECT_FALSE(hotword_service->IsSometimesOnEnabled());
 }