Clean up plug-in placeholders:

chrome/renderer/plugins/plugin_uma.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_RENDERER_PLUGIN_UMA_H_
-#define CHROME_RENDERER_PLUGIN_UMA_H_
+#ifndef CHROME_RENDERER_PLUGINS_PLUGIN_UMA_H_
+#define CHROME_RENDERER_PLUGINS_PLUGIN_UMA_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "googleurl/src/gurl.h"
 
 // Used to send UMA data about missing plugins to UMA histogram server. Method
 // ReportPluginMissing should be called whenever plugin that is not available or
 // enabled is called. We try to determine plugin's type by requested mime type,
@@ skipping 42 matching lines @@
   // Converts plugin's src to plugin type.
   PluginType SrcToPluginType(const GURL& src);
   // Converts plugin's mime type to plugin type.
   PluginType MimeTypeToPluginType(const std::string& mime_type);
 
   scoped_ptr<UMASender> report_sender_;
 
   DISALLOW_COPY_AND_ASSIGN(MissingPluginReporter);
 };
 
-#endif  // CHROME_RENDERER_PLUGIN_UMA_H_
+#endif  // CHROME_RENDERER_PLUGINS_PLUGIN_UMA_H_