Move view_types.h to view_type.h, since that's the standard name for enums.

chrome/common/chrome_view_types.h

-// Copyright (c) 2011 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_COMMON_CHROME_VIEW_TYPES_H_
-#define CHROME_COMMON_CHROME_VIEW_TYPES_H_
-#pragma once
-
-#include "content/public/common/view_types.h"
-
-namespace chrome {
-
-// Indicates different types of views.
-enum ViewType {
-  VIEW_TYPE_CHROME_START = content::VIEW_TYPE_CONTENT_END,
-
-  VIEW_TYPE_BACKGROUND_CONTENTS,
-  VIEW_TYPE_EXTENSION_BACKGROUND_PAGE,
-  VIEW_TYPE_EXTENSION_POPUP,
-  VIEW_TYPE_EXTENSION_INFOBAR,
-  VIEW_TYPE_NOTIFICATION,
-  VIEW_TYPE_EXTENSION_DIALOG,
-};
-
-// Constant strings corresponding to the Type enumeration values.  Used
-// when converting JS arguments.
-extern const char kViewTypeTabContents[];
-extern const char kViewTypeBackgroundPage[];
-extern const char kViewTypePopup[];
-extern const char kViewTypeInfobar[];
-extern const char kViewTypeNotification[];
-extern const char kViewTypeExtensionDialog[];
-extern const char kViewTypeAll[];
-
-}  // namespace chrome
-
-#endif  // CHROME_COMMON_CHROME_VIEW_TYPES_H_