Add FilePath to base namespace.

webkit/fileapi/syncable/syncable_file_system_util.h

Index: webkit/fileapi/syncable/syncable_file_system_util.h
diff --git a/webkit/fileapi/syncable/syncable_file_system_util.h b/webkit/fileapi/syncable/syncable_file_system_util.h
index 439a086bf7b39c64717dbef63be7325fd9b3df43..542856c094ddd3f35cf70af5b2945512a9bde1ea 100644
--- a/webkit/fileapi/syncable/syncable_file_system_util.h
+++ b/webkit/fileapi/syncable/syncable_file_system_util.h
@@ -38,7 +38,8 @@ WEBKIT_STORAGE_EXPORT GURL GetSyncableFileSystemRootURI(
 //   path: '/foo/bar',
 // returns 'filesystem:http://www.example.com/external/service_name/foo/bar'
 WEBKIT_STORAGE_EXPORT FileSystemURL CreateSyncableFileSystemURL(
-    const GURL& origin, const std::string& service_name, const FilePath& path);
+    const GURL& origin, const std::string& service_name,
+    const base::FilePath& path);
 
 // Serializes a given FileSystemURL |url| and sets the serialized string to
 // |serialized_url|. If the URL does not represent a syncable filesystem,