drive: Call OnDirectoryChanged from EntryRevertPerformer

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

Index: chrome/browser/chromeos/drive/sync/remove_performer_unittest.cc
diff --git a/chrome/browser/chromeos/drive/sync/remove_performer_unittest.cc b/chrome/browser/chromeos/drive/sync/remove_performer_unittest.cc
index 1de9c8ac0ec3f42ff44a14c43ec47d6631509f22..085f70b4aa59dc030aabebb20fac2843c41f5beb 100644
--- a/chrome/browser/chromeos/drive/sync/remove_performer_unittest.cc
+++ b/chrome/browser/chromeos/drive/sync/remove_performer_unittest.cc
@@ -15,7 +15,8 @@ namespace internal {
 typedef file_system::OperationTestBase RemovePerformerTest;
 
 TEST_F(RemovePerformerTest, RemoveFile) {
-  RemovePerformer performer(blocking_task_runner(), scheduler(), metadata());
+  RemovePerformer performer(blocking_task_runner(), observer(), scheduler(),
+                            metadata());
 
   base::FilePath file_in_root(FILE_PATH_LITERAL("drive/root/File 1.txt"));
   base::FilePath file_in_subdir(
@@ -60,7 +61,8 @@ TEST_F(RemovePerformerTest, RemoveFile) {
 }
 
 TEST_F(RemovePerformerTest, RemoveShared) {
-  RemovePerformer performer(blocking_task_runner(), scheduler(), metadata());
+  RemovePerformer performer(blocking_task_runner(), observer(), scheduler(),
+                            metadata());
 
   const base::FilePath kPathInMyDrive(FILE_PATH_LITERAL(
       "drive/root/shared.txt"));