[SyncFS] Add DriveUploader to SyncEngineContext

chrome/browser/sync_file_system/drive_backend/register_app_task_unittest.cc

Index: chrome/browser/sync_file_system/drive_backend/register_app_task_unittest.cc
diff --git a/chrome/browser/sync_file_system/drive_backend/register_app_task_unittest.cc b/chrome/browser/sync_file_system/drive_backend/register_app_task_unittest.cc
index 217beac7aea8a4e576a2b4949492b46019820255..720bede0c6d87b7f84f8526bf7835f27fd5ac347 100644
--- a/chrome/browser/sync_file_system/drive_backend/register_app_task_unittest.cc
+++ b/chrome/browser/sync_file_system/drive_backend/register_app_task_unittest.cc
@@ -9,6 +9,7 @@
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
+#include "chrome/browser/drive/drive_uploader.h"
 #include "chrome/browser/drive/fake_drive_service.h"
 #include "chrome/browser/google_apis/gdata_wapi_parser.h"
 #include "chrome/browser/sync_file_system/drive_backend/drive_backend_constants.h"
@@ -67,6 +68,10 @@ class RegisterAppTaskTest : public testing::Test,
     return fake_drive_service_.get();
   }
 
+  virtual drive::DriveUploaderInterface* GetDriveUploader() OVERRIDE {
+    return NULL;
+  }
+
   virtual MetadataDatabase* GetMetadataDatabase() OVERRIDE {
     return metadata_database_.get();
   }