Remove MTP support on Linux.

chrome/test/BUILD.gn

Index: chrome/test/BUILD.gn
diff --git a/chrome/test/BUILD.gn b/chrome/test/BUILD.gn
index 5e1030def0ba40a7455ad9a3d1124fdec823f521..c663268efad7610d3bf11accbf65ef38ab8e22e5 100644
--- a/chrome/test/BUILD.gn
+++ b/chrome/test/BUILD.gn
@@ -3508,7 +3508,6 @@ test("unit_tests") {
       "../browser/media/webrtc/tab_desktop_media_list_unittest.cc",
       "../browser/media_galleries/fileapi/native_media_file_util_unittest.cc",
       "../browser/media_galleries/gallery_watch_manager_unittest.cc",
-      "../browser/media_galleries/linux/mtp_device_object_enumerator_unittest.cc",
       "../browser/media_galleries/mac/mtp_device_delegate_impl_mac_unittest.mm",
       "../browser/media_galleries/media_file_system_registry_unittest.cc",
       "../browser/media_galleries/media_galleries_dialog_controller_mock.cc",
@@ -4325,6 +4324,7 @@ test("unit_tests") {
       "../browser/signin/signin_manager_unittest.cc",
     ]
     sources += [
+      "../browser/media_galleries/linux/mtp_device_object_enumerator_unittest.cc",

[tommycli, 2016/09/20 17:37:46]

same. Should this be /chromeos/ dir?

[Lei Zhang, 2016/09/28 07:23:25]

Done.

       "base/ash_test_environment_chrome.cc",
       "base/ash_test_environment_chrome.h",
     ]