Remove MTP support on Linux.

chrome/browser/media_galleries/chromeos/mtp_read_file_worker.h

Index: chrome/browser/media_galleries/chromeos/mtp_read_file_worker.h
diff --git a/chrome/browser/media_galleries/linux/mtp_read_file_worker.h b/chrome/browser/media_galleries/chromeos/mtp_read_file_worker.h
similarity index 93%
rename from chrome/browser/media_galleries/linux/mtp_read_file_worker.h
rename to chrome/browser/media_galleries/chromeos/mtp_read_file_worker.h
index 842a38012f5cc8981394f937a14e38bd80ff5843..4b9f2da518f6e25ba0717e59225c6bc9e27b19c6 100644
--- a/chrome/browser/media_galleries/linux/mtp_read_file_worker.h
+++ b/chrome/browser/media_galleries/chromeos/mtp_read_file_worker.h
@@ -2,8 +2,8 @@
 // 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_READ_FILE_WORKER_H_
-#define CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_READ_FILE_WORKER_H_
+#ifndef CHROME_BROWSER_MEDIA_GALLERIES_CHROMEOS_MTP_READ_FILE_WORKER_H_
+#define CHROME_BROWSER_MEDIA_GALLERIES_CHROMEOS_MTP_READ_FILE_WORKER_H_
 
 #include <stdint.h>
 
@@ -89,4 +89,4 @@ class MTPReadFileWorker {
   DISALLOW_COPY_AND_ASSIGN(MTPReadFileWorker);
 };
 
-#endif  // CHROME_BROWSER_MEDIA_GALLERIES_LINUX_MTP_READ_FILE_WORKER_H_
+#endif  // CHROME_BROWSER_MEDIA_GALLERIES_CHROMEOS_MTP_READ_FILE_WORKER_H_