Wire FileSystemOperation::TouchFile to Drive.

chrome/browser/chromeos/gdata/drive_file_system_proxy.cc

 // Copyright (c) 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.
 
 #include "chrome/browser/chromeos/gdata/drive_file_system_proxy.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 536 matching lines @@
 
 void DriveFileSystemProxy::NotifyCloseFile(const FileSystemURL& url) {
   FilePath file_path;
   if (!ValidateUrl(url, &file_path))
     return;
 
   file_system_->CloseFile(file_path,
                           base::Bind(&EmitDebugLogForCloseFile, file_path));
 }
 
+void DriveFileSystemProxy::TouchFile(
+    const fileapi::FileSystemURL& url,
+    const base::Time& last_access_time,
+    const base::Time& last_modified_time,
+    const FileSystemOperation::StatusCallback& callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+
+  // TODO(kinaba,kochi): crbug.com/144369. Support this operations once we have
+  // migrated to the new Drive API.
+  MessageLoopProxy::current()->PostTask(FROM_HERE,
+       base::Bind(callback, base::PLATFORM_FILE_ERROR_INVALID_OPERATION));
+}
+
 void DriveFileSystemProxy::CreateSnapshotFile(
     const FileSystemURL& file_url,
     const FileSystemOperation::SnapshotFileCallback& callback) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   FilePath file_path;
   if (!ValidateUrl(file_url, &file_path)) {
     MessageLoopProxy::current()->PostTask(FROM_HERE,
          base::Bind(callback,
                     base::PLATFORM_FILE_ERROR_NOT_FOUND,
@@ skipping 166 matching lines @@
 void DriveFileSystemProxy::CloseWritableSnapshotFile(
     const FilePath& virtual_path,
     const FilePath& local_path) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   file_system_->CloseFile(virtual_path,
                           base::Bind(&EmitDebugLogForCloseFile, virtual_path));
 }
 
 }  // namespace gdata