Support sending a sliced file in chromium....

chrome/common/render_messages_internal.h

 // Copyright (c) 2010 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.
 
 // This header is meant to be included in multiple passes, hence no traditional
 // header guard.
 // See ipc_message_macros.h for explanation of the macros and passes.
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "build/build_config.h"
 
 #include "base/file_path.h"
 #include "base/nullable_string16.h"
 #include "base/sync_socket.h"
+#include "base/time.h"
 #include "base/values.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/extensions/update_manifest.h"
 #include "chrome/common/geoposition.h"
 #include "chrome/common/nacl_types.h"
 #include "chrome/common/notification_type.h"
 #include "chrome/common/page_zoom.h"
 #include "gfx/rect.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_message.h"
@@ skipping 2065 matching lines @@
   IPC_SYNC_MESSAGE_CONTROL2_1(ViewHostMsg_DOMStorageClear,
                               int64 /* storage_area_id */,
                               GURL /* url */,
                               bool /* something_cleared */)
 
   // Get file size in bytes. Set result to -1 if failed to get the file size.
   IPC_SYNC_MESSAGE_CONTROL1_1(ViewHostMsg_GetFileSize,
                               FilePath /* path */,
                               int64 /* result */)
 
+  // Get file modification time in seconds. Set result to 0 if failed to get the
+  // file modification time.
+  IPC_SYNC_MESSAGE_CONTROL1_1(ViewHostMsg_GetFileModificationTime,
+                              FilePath /* path */,
+                              base::Time /* result */)
+
   // Sent by the renderer process to acknowledge receipt of a
   // ViewMsg_CSSInsertRequest message and css has been inserted into the frame.
   IPC_MESSAGE_ROUTED0(ViewHostMsg_OnCSSInserted)
 
   // Asks the browser process to open a DB file with the given name
   IPC_MESSAGE_CONTROL3(ViewHostMsg_DatabaseOpenFile,
                        string16 /* vfs file name */,
                        int /* desired flags */,
                        int32 /* a unique message ID */)
 
@@ skipping 157 matching lines @@
                        int /* render_view_id */,
                        int /* bridge_id */)
 
   // The |render_view_id| and |bridge_id| requests Geolocation service to
   // resume.
   IPC_MESSAGE_CONTROL2(ViewHostMsg_Geolocation_Resume,
                        int /* render_view_id */,
                        int /* bridge_id */)
 
 IPC_END_MESSAGES(ViewHost)