Set the Feature's ChannelForTesting to Trunk during extension tests, so that

chrome/browser/extensions/extension_browsertest.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/extensions/extension_browsertest.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/file_path.h"
@@ skipping 11 matching lines @@
 #include "chrome/browser/extensions/extension_install_prompt.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/unpacked_installer.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/omnibox/location_bar.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
+#include "chrome/common/extensions/features/feature.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_view_host.h"
 
 using extensions::Extension;
 
 ExtensionBrowserTest::ExtensionBrowserTest()
     : loaded_(false),
       installed_(false),
       extension_installs_observed_(0),
       extension_load_errors_observed_(0),
       target_page_action_count_(-1),
       target_visible_page_action_count_(-1) {
   EXPECT_TRUE(temp_dir_.CreateUniqueTempDir());
   AppShortcutManager::SetShortcutCreationDisabledForTesting(true);
 }
 
 ExtensionBrowserTest::~ExtensionBrowserTest() {
   AppShortcutManager::SetShortcutCreationDisabledForTesting(false);
 }
 
 void ExtensionBrowserTest::SetUpCommandLine(CommandLine* command_line) {
   // This enables DOM automation for tab contentses.
   EnableDOMAutomation();
 
+  extensions::Feature::SetChannelForTesting(
+      chrome::VersionInfo::CHANNEL_UNKNOWN);
+
   PathService::Get(chrome::DIR_TEST_DATA, &test_data_dir_);
   test_data_dir_ = test_data_dir_.AppendASCII("extensions");
 
 #if defined(OS_CHROMEOS)
   // This makes sure that we create the Default profile first, with no
   // ExtensionService and then the real profile with one, as we do when
   // running on chromeos.
   command_line->AppendSwitchASCII(switches::kLoginUser,
                                   "TestUser@gmail.com");
   command_line->AppendSwitchASCII(switches::kLoginProfile, "user");
@@ skipping 559 matching lines @@
     case content::NOTIFICATION_LOAD_STOP:
       VLOG(1) << "Got LOAD_STOP notification.";
       MessageLoopForUI::current()->Quit();
       break;
 
     default:
       NOTREACHED();
       break;
   }
 }