drive: Return NOT_FOUND from FakeDriveService after the entry gets deleted

chrome/browser/sync_file_system/drive_backend_v1/fake_drive_uploader.cc

Index: chrome/browser/sync_file_system/drive_backend_v1/fake_drive_uploader.cc
diff --git a/chrome/browser/sync_file_system/drive_backend_v1/fake_drive_uploader.cc b/chrome/browser/sync_file_system/drive_backend_v1/fake_drive_uploader.cc
index 2a76c005ccf97bca0b4073e5d92bdd95841ca2c2..71d132574ba14f21db0acdbf3cdff423ecae691b 100644
--- a/chrome/browser/sync_file_system/drive_backend_v1/fake_drive_uploader.cc
+++ b/chrome/browser/sync_file_system/drive_backend_v1/fake_drive_uploader.cc
@@ -49,12 +49,10 @@ void DidGetResourceEntryForUploadExisting(
     const UploadCompletionCallback& callback,
     GDataErrorCode error,
     scoped_ptr<ResourceEntry> entry) {
-  ASSERT_EQ(google_apis::HTTP_SUCCESS, error);
-  ASSERT_TRUE(entry);
   base::MessageLoopProxy::current()->PostTask(
       FROM_HERE,
       base::Bind(callback,
-                 google_apis::HTTP_SUCCESS,
+                 error,
                  GURL(),
                  base::Passed(&entry)));
 }