Add FilePath to base namespace.

chrome/browser/plugins/plugin_installer.h

 // Copyright (c) 2012 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_PLUGINS_PLUGIN_INSTALLER_H_
 #define CHROME_BROWSER_PLUGINS_PLUGIN_INSTALLER_H_
 
 #include "base/observer_list.h"
 #include "base/string16.h"
 #include "base/version.h"
 #include "chrome/browser/plugins/plugin_metadata.h"
 #include "content/public/browser/download_item.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/net_errors.h"
 
-class FilePath;
 class PluginInstallerObserver;
 class WeakPluginInstallerObserver;
 
 namespace content {
 class WebContents;
 }
 
 namespace webkit {
 struct WebPluginInfo;
 }
@@ skipping 36 matching lines @@
   void DownloadCancelled();
 
   InstallerState state_;
   ObserverList<PluginInstallerObserver> observers_;
   ObserverList<WeakPluginInstallerObserver> weak_observers_;
 
   DISALLOW_COPY_AND_ASSIGN(PluginInstaller);
 };
 
 #endif  // CHROME_BROWSER_PLUGINS_PLUGIN_INSTALLER_H_