[Sync] Adding integration tests for USS encryption and fixing a worker bug.

components/browser_sync/profile_sync_service.cc

Index: components/browser_sync/profile_sync_service.cc
diff --git a/components/browser_sync/profile_sync_service.cc b/components/browser_sync/profile_sync_service.cc
index 0a299982a6d4936324ee066eacb9607e2d45f760..86eb0068764fdffdf387853a9811d4bdb6c5ef26 100644
--- a/components/browser_sync/profile_sync_service.cc
+++ b/components/browser_sync/profile_sync_service.cc
@@ -1135,7 +1135,6 @@ void ProfileSyncService::OnPassphraseRequired(
            << syncer::PassphraseRequiredReasonToString(reason);
   passphrase_required_reason_ = reason;
 
-  // TODO(stanisc): http://crbug.com/351005: Does this support USS types?
   const syncer::ModelTypeSet types = GetPreferredDataTypes();
   if (data_type_manager_) {
     // Reconfigure without the encrypted types (excluded implicitly via the
@@ -1163,7 +1162,6 @@ void ProfileSyncService::OnPassphraseAccepted() {
 
   // Make sure the data types that depend on the passphrase are started at
   // this time.
-  // TODO(stanisc): http://crbug.com/351005: Does this support USS types?
   const syncer::ModelTypeSet types = GetPreferredDataTypes();
   if (data_type_manager_) {
     // Re-enable any encrypted types if necessary.
@@ -2224,7 +2222,6 @@ void GetAllNodesRequestHelper::OnReceivedNodesForType(
 
 void ProfileSyncService::GetAllNodes(
     const base::Callback<void(std::unique_ptr<base::ListValue>)>& callback) {
-  // TODO(stanisc): crbug.com/328606: Make this work for USS datatypes.
   ModelTypeSet all_types = GetActiveDataTypes();
   all_types.PutAll(syncer::ControlTypes());
   scoped_refptr<GetAllNodesRequestHelper> helper =