Move MTPDeviceDelegateImplLinux worker classes to its own files.

chrome/browser/media_gallery/linux/mtp_device_operations_utils.cc

Index: chrome/browser/media_gallery/linux/mtp_device_operations_utils.cc
diff --git a/chrome/browser/media_gallery/linux/mtp_device_operations_utils.cc b/chrome/browser/media_gallery/linux/mtp_device_operations_utils.cc
new file mode 100644
index 0000000000000000000000000000000000000000..c92dda0bcd77d28f8fa88eef43177d35765ca101
--- /dev/null
+++ b/chrome/browser/media_gallery/linux/mtp_device_operations_utils.cc
@@ -0,0 +1,19 @@
+// 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/media_gallery/linux/mtp_device_operations_utils.h"
+
+#include "chrome/browser/media_transfer_protocol/media_transfer_protocol_manager.h"
+
+namespace chrome {
+
+// Returns MediaTransferProtocolManager instance on success or NULL on failure.
+MediaTransferProtocolManager* GetMediaTransferProtocolManager() {
+  MediaTransferProtocolManager* mtp_device_mgr =
+      MediaTransferProtocolManager::GetInstance();
+  DCHECK(mtp_device_mgr);
+  return mtp_device_mgr;
+}
+
+}  // namespace chrome