Mount MTP devices in Chrome OS Files.app.

chrome/browser/chromeos/fileapi/file_system_backend_unittest.cc

Index: chrome/browser/chromeos/fileapi/file_system_backend_unittest.cc
diff --git a/chrome/browser/chromeos/fileapi/file_system_backend_unittest.cc b/chrome/browser/chromeos/fileapi/file_system_backend_unittest.cc
index 2687ace81c959e7707137291525dcf7e37bf7e28..8d3fe4135b2f56e3693974f6969f5cdce5a58fa4 100644
--- a/chrome/browser/chromeos/fileapi/file_system_backend_unittest.cc
+++ b/chrome/browser/chromeos/fileapi/file_system_backend_unittest.cc
@@ -43,6 +43,7 @@ TEST(ChromeOSFileSystemBackendTest, DefaultMountPoints) {
   chromeos::FileSystemBackend backend(
       NULL,  // drive_delegate
       NULL,  // file_system_provider_delegate
+      NULL,  // mtp_delegate
       storage_policy,
       mount_points.get(),
       fileapi::ExternalMountPoints::GetSystemInstance());
@@ -71,6 +72,7 @@ TEST(ChromeOSFileSystemBackendTest, GetRootDirectories) {
 
   chromeos::FileSystemBackend backend(NULL,  // drive_delegate
                                       NULL,  // file_system_provider_delegate
+                                      NULL,  // mtp_delegate
                                       storage_policy,
                                       mount_points.get(),
                                       system_mount_points.get());
@@ -117,6 +119,7 @@ TEST(ChromeOSFileSystemBackendTest, AccessPermissions) {
       fileapi::ExternalMountPoints::CreateRefCounted());
   chromeos::FileSystemBackend backend(NULL,  // drive_delegate
                                       NULL,  // file_system_provider_delegate
+                                      NULL,  // mtp_delegate
                                       storage_policy,
                                       mount_points.get(),
                                       system_mount_points.get());
@@ -210,6 +213,7 @@ TEST(ChromeOSFileSystemBackendTest, GetVirtualPathConflictWithSystemPoints) {
       fileapi::ExternalMountPoints::CreateRefCounted());
   chromeos::FileSystemBackend backend(NULL,  // drive_delegate
                                       NULL,  // file_system_provider_delegate
+                                      NULL,  // mtp_delegate
                                       storage_policy,
                                       mount_points.get(),
                                       system_mount_points.get());