Add tests for sync performes about HTTP_FORBIDDEN handling

chrome/browser/chromeos/drive/sync/entry_update_performer_unittest.cc

Index: chrome/browser/chromeos/drive/sync/entry_update_performer_unittest.cc
diff --git a/chrome/browser/chromeos/drive/sync/entry_update_performer_unittest.cc b/chrome/browser/chromeos/drive/sync/entry_update_performer_unittest.cc
index 54d77ddbc7cb0e22ae0c6c7e311df1b3962190f6..bcb3d5e969087f86e75d744eba80f65b62f84b53 100644
--- a/chrome/browser/chromeos/drive/sync/entry_update_performer_unittest.cc
+++ b/chrome/browser/chromeos/drive/sync/entry_update_performer_unittest.cc
@@ -551,5 +551,48 @@ TEST_F(EntryUpdatePerformerTest, UpdateEntry_CreateDirectory) {
   EXPECT_TRUE(server_entry->IsDirectory());
 }
 
+TEST_F(EntryUpdatePerformerTest, UpdateEntry_InsufficientPermission) {
+  base::FilePath src_path(
+      FILE_PATH_LITERAL("drive/root/Directory 1/SubDirectory File 1.txt"));
+
+  ResourceEntry src_entry;
+  EXPECT_EQ(FILE_ERROR_OK, GetLocalResourceEntry(src_path, &src_entry));
+
+  // Update local entry.
+  ResourceEntry updated_entry(src_entry);
+  updated_entry.set_title("Moved" + src_entry.title());
+  updated_entry.set_metadata_edit_state(ResourceEntry::DIRTY);
+
+  FileError error = FILE_ERROR_FAILED;
+  base::PostTaskAndReplyWithResult(
+      blocking_task_runner(),
+      FROM_HERE,
+      base::Bind(&ResourceMetadata::RefreshEntry,
+                 base::Unretained(metadata()),
+                 updated_entry),
+      google_apis::test_util::CreateCopyResultCallback(&error));
+  content::RunAllBlockingPoolTasksUntilIdle();
+  EXPECT_EQ(FILE_ERROR_OK, error);
+
+  // Set user permission to forbid server side update.
+  EXPECT_EQ(google_apis::HTTP_SUCCESS, fake_service()->SetUserPermission(
+      src_entry.resource_id(), google_apis::drive::PERMISSION_ROLE_READER));
+
+  // Try to perform update.
+  error = FILE_ERROR_FAILED;
+  performer_->UpdateEntry(
+      src_entry.local_id(),
+      ClientContext(USER_INITIATED),
+      google_apis::test_util::CreateCopyResultCallback(&error));
+  content::RunAllBlockingPoolTasksUntilIdle();
+  EXPECT_EQ(FILE_ERROR_OK, error);
+
+  // This should result in reverting the local change.
+  ResourceEntry result_entry;
+  EXPECT_EQ(FILE_ERROR_OK,
+            GetLocalResourceEntryById(src_entry.local_id(), &result_entry));
+  EXPECT_EQ(src_entry.title(), result_entry.title());
+}
+
 }  // namespace internal
 }  // namespace drive