Mount MTP devices in Chrome OS Files.app.

chrome/browser/chromeos/fileapi/file_system_backend.h

Index: chrome/browser/chromeos/fileapi/file_system_backend.h
diff --git a/chrome/browser/chromeos/fileapi/file_system_backend.h b/chrome/browser/chromeos/fileapi/file_system_backend.h
index 9578126947160868177a328af31361b54da0e744..5ff3520577e867ee5a5f696dd18aa2b007a6c509 100644
--- a/chrome/browser/chromeos/fileapi/file_system_backend.h
+++ b/chrome/browser/chromeos/fileapi/file_system_backend.h
@@ -11,6 +11,7 @@
 #include "base/compiler_specific.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
+#include "chrome/browser/media_galleries/fileapi/device_media_async_file_util.h"
 #include "webkit/browser/fileapi/file_system_backend.h"
 #include "webkit/browser/quota/special_storage_policy.h"
 #include "webkit/common/fileapi/file_system_types.h"
@@ -68,6 +69,7 @@ class FileSystemBackend : public fileapi::ExternalFileSystemBackend {
   // The ownerships of |drive_delegate| and |file_system_provider_delegate| are
   // also taken.
   FileSystemBackend(
+      const base::FilePath& profile_path,
       FileSystemBackendDelegate* drive_delegate,
       FileSystemBackendDelegate* file_system_provider_delegate,
       scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy,
@@ -131,6 +133,7 @@ class FileSystemBackend : public fileapi::ExternalFileSystemBackend {
   scoped_refptr<quota::SpecialStoragePolicy> special_storage_policy_;
   scoped_ptr<FileAccessPermissions> file_access_permissions_;
   scoped_ptr<fileapi::AsyncFileUtil> local_file_util_;
+  scoped_ptr<DeviceMediaAsyncFileUtil> device_media_async_file_util_;
 
   // The delegate instance for the drive file system related operations.
   scoped_ptr<FileSystemBackendDelegate> drive_delegate_;