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

chrome/browser/extensions/extension_host.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_BROWSER_EXTENSIONS_EXTENSION_HOST_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_HOST_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/perftimer.h"
 #include "chrome/browser/extensions/extension_function_dispatcher.h"
 #include "content/browser/javascript_dialogs.h"
 #include "content/browser/tab_contents/tab_contents_delegate.h"
 #include "content/browser/tab_contents/tab_contents_observer.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
-#include "content/public/common/view_types.h"
+#include "content/public/common/view_type.h"
 
 #if defined(TOOLKIT_VIEWS)
 #include "chrome/browser/ui/views/extensions/extension_view.h"
 #elif defined(OS_MACOSX)
 #include "chrome/browser/ui/cocoa/extensions/extension_view_mac.h"
 #elif defined(TOOLKIT_GTK)
 #include "chrome/browser/ui/gtk/extensions/extension_view_gtk.h"
 #endif
 
 class Browser;
@@ skipping 177 matching lines @@
   // The relevant TabContents associated with this ExtensionHost, if any.
   TabContents* associated_tab_contents_;
 
   // Used to measure how long it's been since the host was created.
   PerfTimer since_created_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionHost);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_HOST_H_