Remove "2" suffixes from options2 code.

chrome/browser/ui/webui/options2/search_engine_manager_handler.h

Index: chrome/browser/ui/webui/options2/search_engine_manager_handler.h
diff --git a/chrome/browser/ui/webui/options2/search_engine_manager_handler2.h b/chrome/browser/ui/webui/options2/search_engine_manager_handler.h
similarity index 97%
rename from chrome/browser/ui/webui/options2/search_engine_manager_handler2.h
rename to chrome/browser/ui/webui/options2/search_engine_manager_handler.h
index e2bddaf0e3ceaf3b0b80ed3ac8c950d73c4e5be4..638a0477bb9db9348fdca28d4aa9050d39a9e226 100644
--- a/chrome/browser/ui/webui/options2/search_engine_manager_handler2.h
+++ b/chrome/browser/ui/webui/options2/search_engine_manager_handler.h
@@ -2,11 +2,11 @@
 // 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_OPTIONS2_SEARCH_ENGINE_MANAGER_HANDLER2_H_
-#define CHROME_BROWSER_UI_WEBUI_OPTIONS2_SEARCH_ENGINE_MANAGER_HANDLER2_H_
+#ifndef CHROME_BROWSER_UI_WEBUI_OPTIONS2_SEARCH_ENGINE_MANAGER_HANDLER_H_
+#define CHROME_BROWSER_UI_WEBUI_OPTIONS2_SEARCH_ENGINE_MANAGER_HANDLER_H_
 
 #include "chrome/browser/ui/search_engines/edit_search_engine_controller.h"
-#include "chrome/browser/ui/webui/options2/options_ui2.h"
+#include "chrome/browser/ui/webui/options2/options_ui.h"
 #include "ui/base/models/table_model_observer.h"
 
 class KeywordEditorController;
@@ -83,4 +83,4 @@ class SearchEngineManagerHandler : public OptionsPageUIHandler,
 
 }  // namespace options2
 
-#endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS2_SEARCH_ENGINE_MANAGER_HANDLER2_H_
+#endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS2_SEARCH_ENGINE_MANAGER_HANDLER_H_