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

chrome/browser/extensions/hotword_browsertest.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/files/file_path.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/extensions/component_loader.h"
 #include "chrome/browser/extensions/error_console/error_console.h"
 #include "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "content/public/common/content_switches.h"
 #include "extensions/common/extension.h"
 #include "extensions/test/extension_test_message_listener.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 
 namespace extensions {
 
 static const char kHotwordHelperExtensionId[] =
     "dnhpdliibojhegemfjheidglijccjfmc";
 
 class HotwordBrowserTest : public ExtensionBrowserTest {
  public:
   HotwordBrowserTest() : error_console_(NULL) { }
   ~HotwordBrowserTest() override {}
 
  protected:
   void SetUpInProcessBrowserTestFixture() override {
     ExtensionBrowserTest::SetUpInProcessBrowserTestFixture();
 
     // Force the VoiceTrigger field trial on to enable the hotword_helper
     // extension.
     base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
         switches::kForceFieldTrials, "VoiceTrigger/Install/");
+    // This test is only valid with version 1 of hotwording.
+    base::CommandLine::ForCurrentProcess()->AppendSwitch(
+        switches::kDisableExperimentalHotwording);
     // Load the hotword_helper extension.
     ComponentLoader::EnableBackgroundExtensionsForTesting();
 
     // We need to enable the ErrorConsole FeatureSwitch in order to collect
     // errors. This should be enabled on any channel <= Dev, but let's make
     // sure (in case a test is running on, e.g., a beta channel).
     FeatureSwitch::error_console()->SetOverrideValue(
         FeatureSwitch::OVERRIDE_ENABLED);
   }
 
@@ skipping 29 matching lines @@
   ASSERT_TRUE(extension);
   const Extension* test_extension = LoadExtension(
       test_data_dir_.AppendASCII("hotword"));
   ASSERT_TRUE(test_extension);
 
   ASSERT_TRUE(doneListener.WaitUntilSatisfied());
   ASSERT_TRUE(error_console()->GetErrorsForExtension(extension->id()).empty());
 }
 
 }  // namespace extensions