Remove MTP support on Linux.

chrome/browser/media_galleries/chromeos/mtp_device_delegate_impl_chromeos.h

 // 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.
 
-#ifndef CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_DELEGATE_IMPL_LINUX_H_
-#define CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_DELEGATE_IMPL_LINUX_H_
+#ifndef CHROME_BROWSER_MEDIA_GALLERIES_CHROMEOS_MTP_DEVICE_DELEGATE_IMPL_CHROMEOS_H_
+#define CHROME_BROWSER_MEDIA_GALLERIES_CHROMEOS_MTP_DEVICE_DELEGATE_IMPL_CHROMEOS_H_
 
 #include <stdint.h>
 
 #include <deque>
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 
 #include "base/callback.h"
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/files/file_path.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
+#include "chrome/browser/media_galleries/chromeos/mtp_device_task_helper.h"
 #include "chrome/browser/media_galleries/fileapi/mtp_device_async_delegate.h"
-#include "chrome/browser/media_galleries/linux/mtp_device_task_helper.h"
 #include "content/public/browser/browser_thread.h"
 #include "storage/browser/fileapi/async_file_util.h"
 
 struct SnapshotRequestInfo;
 
 // MTPDeviceDelegateImplLinux communicates with the media transfer protocol
 // (MTP) device to complete file system operations. These operations are
 // performed asynchronously. Instantiate this class per MTP device storage.
 // MTPDeviceDelegateImplLinux lives on the IO thread.
 // MTPDeviceDelegateImplLinux does a call-and-reply to the UI thread
@@ skipping 487 matching lines @@
   // operation. Used to service incoming GetFileInfo calls for the duration of
   // the ReadDirectory operation.
   FileInfoCache file_info_cache_;
 
   // For callbacks that may run after destruction.
   base::WeakPtrFactory<MTPDeviceDelegateImplLinux> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MTPDeviceDelegateImplLinux);
 };
 
-#endif  // CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_DEVICE_DELEGATE_IMPL_LINUX_H_
+#endif  // CHROME_BROWSER_MEDIA_GALLERIES_CHROMEOS_MTP_DEVICE_DELEGATE_IMPL_CHROMEOS_H_