[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 81dcf3f3d75bd012e320b0bee3d2a80255613dd3..4aa3680cd51f4ea0c42bfc8d1d262932e533c34e 100644
--- a/components/browser_sync/profile_sync_service.cc
+++ b/components/browser_sync/profile_sync_service.cc
@@ -1134,7 +1134,6 @@ 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
@@ -1162,7 +1161,6 @@ 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.
@@ -2223,7 +2221,6 @@ 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 =