[Extensions] Move Feature channel code into //extensions

chrome/browser/ui/webui/extensions/extension_settings_browsertest.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_SETTINGS_BROWSERTEST_H_
 #define CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_SETTINGS_BROWSERTEST_H_
 
 #include "base/macros.h"
 #include "chrome/browser/extensions/extension_test_notification_observer.h"
-#include "chrome/common/extensions/features/feature_channel.h"
 #include "chrome/test/base/web_ui_browser_test.h"
 #include "extensions/browser/extension_dialog_auto_confirm.h"
 #include "extensions/browser/test_management_policy.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/feature_switch.h"
+#include "extensions/common/features/feature_channel.h"
 
 class Profile;
 
 // C++ test fixture used by extension_settings_browsertest.js.
 class ExtensionSettingsUIBrowserTest : public WebUIBrowserTest {
  public:
   ExtensionSettingsUIBrowserTest();
   ~ExtensionSettingsUIBrowserTest() override;
 
  protected:
@@ skipping 48 matching lines @@
   std::unique_ptr<extensions::FeatureSwitch::ScopedOverride>
       error_console_override_;
 
   std::unique_ptr<extensions::ScopedTestDialogAutoConfirm>
       uninstall_auto_confirm_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionSettingsUIBrowserTest);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_EXTENSIONS_EXTENSION_SETTINGS_BROWSERTEST_H_