[SyncFS] Retry initialization of MetadataDatabase on failure of loading ServiceMetadata

chrome/browser/sync_file_system/drive_backend/metadata_database_unittest.cc

Index: chrome/browser/sync_file_system/drive_backend/metadata_database_unittest.cc
diff --git a/chrome/browser/sync_file_system/drive_backend/metadata_database_unittest.cc b/chrome/browser/sync_file_system/drive_backend/metadata_database_unittest.cc
index 733797a010f35df97620bb34e99d53601162c026..370f93d7a175f486e34b87adba80d0f4a4310205 100644
--- a/chrome/browser/sync_file_system/drive_backend/metadata_database_unittest.cc
+++ b/chrome/browser/sync_file_system/drive_backend/metadata_database_unittest.cc
@@ -641,6 +641,15 @@ TEST_F(MetadataDatabaseTest, InitializationTest_Empty) {
   EXPECT_EQ(SYNC_STATUS_OK, InitializeMetadataDatabase());
   DropDatabase();
   EXPECT_EQ(SYNC_STATUS_OK, InitializeMetadataDatabase());
+
+  DropDatabase();
+
+  scoped_ptr<LevelDBWrapper> db = InitializeLevelDB();
+  db->Put(kServiceMetadataKey, "Unparsable string");
+  EXPECT_TRUE(db->Commit().ok());
+  db.reset();
+
+  EXPECT_EQ(SYNC_STATUS_OK, InitializeMetadataDatabase());
 }
 
 TEST_F(MetadataDatabaseTest, InitializationTest_SimpleTree) {