Replace FilePath with base::FilePath in some more top level directories.

ui/metro_viewer/metro_viewer_messages.h

 // Copyright 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.
 
 // Multiply-included message file, no include guard.
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "ipc/ipc_message_macros.h"
@@ skipping 62 matching lines @@
                      string16,       /* filename */
                      int)            /* filter_index */
 
 // Informs the browser of the result of a file open operation.
 IPC_MESSAGE_CONTROL2(MetroViewerHostMsg_FileOpenDone,
                      bool,           /* success */
                      string16)       /* filename */
 
 IPC_MESSAGE_CONTROL2(MetroViewerHostMsg_MultiFileOpenDone,
                      bool,                    /* success */
-                     std::vector<FilePath>)   /* filenames */
+                     std::vector<base::FilePath>)   /* filenames */
 
 
 // Messages sent from the browser to the viewer:
 
 // Requests the viewer to change the pointer to a new cursor.
 IPC_MESSAGE_CONTROL1(MetroViewerHostMsg_SetCursor,
                      int64         /* cursor */);
 
 // This structure contains the parameters sent to the viewer process to display
 // the file save dialog.
@@ skipping 20 matching lines @@
 IPC_MESSAGE_CONTROL1(MetroViewerHostMsg_DisplayFileSaveAs,
                      MetroViewerHostMsg_SaveAsDialogParams)
 
 // Requests the viewer to display the file open dialog.
 IPC_MESSAGE_CONTROL4(MetroViewerHostMsg_DisplayFileOpen,
                      string16,   /* title */
                      string16,   /* filter */
                      string16,   /* Default path */
                      bool)       /* allow_multi_select */