Remove the path from PlatformFileInfo; it's cleaner just to pass it along as a

content/common/file_system_messages.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.
 
 // IPC messages for the file system.
 // Multiply-included message file, hence no include guard.
 
 #include "base/file_util_proxy.h"
 #include "ipc/ipc_message_macros.h"
 #include "webkit/fileapi/file_system_types.h"
@@ skipping 12 matching lines @@
 // WebFrameClient::openFileSystem response messages.
 IPC_MESSAGE_CONTROL4(FileSystemMsg_OpenComplete,
                      int /* request_id */,
                      bool /* accepted */,
                      std::string /* name */,
                      FilePath /* root_path */)
 
 // WebFileSystem response messages.
 IPC_MESSAGE_CONTROL1(FileSystemMsg_DidSucceed,
                      int /* request_id */)
-IPC_MESSAGE_CONTROL2(FileSystemMsg_DidReadMetadata,
+IPC_MESSAGE_CONTROL3(FileSystemMsg_DidReadMetadata,
                      int /* request_id */,
-                     base::PlatformFileInfo)
+                     base::PlatformFileInfo,
+                     FilePath /* true platform path, where possible */)
 IPC_MESSAGE_CONTROL3(FileSystemMsg_DidReadDirectory,
                      int /* request_id */,
                      std::vector<base::FileUtilProxy::Entry> /* entries */,
                      bool /* has_more */)
 IPC_MESSAGE_CONTROL3(FileSystemMsg_DidWrite,
                      int /* request_id */,
                      int64 /* byte count */,
                      bool /* complete */)
 IPC_MESSAGE_CONTROL2(FileSystemMsg_DidFail,
                      int /* request_id */,
@@ skipping 68 matching lines @@
 IPC_MESSAGE_CONTROL4(FileSystemHostMsg_TouchFile,
                      int /* request_id */,
                      FilePath /* path */,
                      base::Time /* last_access_time */,
                      base::Time /* last_modified_time */)
 
 // WebFileWriter::cancel() message.
 IPC_MESSAGE_CONTROL2(FileSystemHostMsg_CancelWrite,
                      int /* request id */,
                      int /* id of request to cancel */)