Fix dependency: make file_system_util not depend on FileSystemURL

webkit/fileapi/file_system_util.h

Index: webkit/fileapi/file_system_util.h
diff --git a/webkit/fileapi/file_system_util.h b/webkit/fileapi/file_system_util.h
index e49a17748809720dc820473757628e836cd8ef11..1d3d37bfe1b8a14d5bdaedcad5ce45ea5f482f1e 100644
--- a/webkit/fileapi/file_system_util.h
+++ b/webkit/fileapi/file_system_util.h
@@ -20,8 +20,6 @@ class GURL;
 
 namespace fileapi {
 
-class FileSystemURL;
-
 extern const char kPersistentDir[];
 extern const char kTemporaryDir[];
 extern const char kExternalDir[];
@@ -145,12 +143,6 @@ WEBKIT_STORAGE_EXPORT std::string GetIsolatedFileSystemRootURIString(
     const std::string& filesystem_id,
     const std::string& optional_root_name);
 
-// Returns true if |url1| and |url2| belong to the same filesystem
-// (i.e. url1.origin() == url2.origin() && url1.type() == url2.type())
-WEBKIT_STORAGE_EXPORT bool AreSameFileSystem(
-    const FileSystemURL& url1,
-    const FileSystemURL& url2);
-
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_FILE_SYSTEM_UTIL_H_