[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..02f02f5870d102b6015bd5bfe2a67cdf56b59125 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
@@ -643,6 +643,14 @@ TEST_F(MetadataDatabaseTest, InitializationTest_Empty) {
   EXPECT_EQ(SYNC_STATUS_OK, InitializeMetadataDatabase());
 }
 
+TEST_F(MetadataDatabaseTest, InitializationTest_Corruption) {

[nhiroki, 2014/09/02 07:26:04]

I think this and other tests in MetadataDatabaseTest don't work for the on-disk
indexing version since it's disabled by the flag. How about enable them for both
versions? (a separate patch is OK)

[peria, 2014/09/02 07:36:27]

filed http://crbug.com/409743

[nhiroki, 2014/09/02 08:36:25]

Acknowledged.

+  scoped_ptr<LevelDBWrapper> db = InitializeLevelDB();
+  db->Put(kServiceMetadataKey, "Unparsable string");
+  db->Commit();
+  EXPECT_EQ(SYNC_DATABASE_ERROR_FAILED, InitializeMetadataDatabase());
+  EXPECT_EQ(SYNC_STATUS_OK, InitializeMetadataDatabase());
+}
+
 TEST_F(MetadataDatabaseTest, InitializationTest_SimpleTree) {
   TrackedFile sync_root(CreateTrackedSyncRoot());
   TrackedFile app_root(CreateTrackedFolder(sync_root, "app_id"));