[Sync] Move change-related methods out of SyncManager::Observer

chrome/browser/sync/syncable/directory_change_delegate.h

Index: chrome/browser/sync/syncable/directory_change_delegate.h
diff --git a/chrome/browser/sync/syncable/directory_change_delegate.h b/chrome/browser/sync/syncable/directory_change_delegate.h
index 284ed72e4ae7ab73fed64424d0776b4154451f3a..3851f299a3d806b522aa4f601a501dbde3cf97f9 100644
--- a/chrome/browser/sync/syncable/directory_change_delegate.h
+++ b/chrome/browser/sync/syncable/directory_change_delegate.h
@@ -24,14 +24,15 @@ namespace syncable {
 class DirectoryChangeDelegate {
  public:
   virtual void HandleCalculateChangesChangeEventFromSyncApi(
-      const EntryKernelMutationMap& mutations,
+      const ImmutableEntryKernelMutationMap& mutations,
       BaseTransaction* trans) = 0;
   virtual void HandleCalculateChangesChangeEventFromSyncer(
-      const EntryKernelMutationMap& mutations,
+      const ImmutableEntryKernelMutationMap& mutations,
       BaseTransaction* trans) = 0;
   // Must return the set of all ModelTypes that were modified in the
   // transaction.
   virtual ModelTypeBitSet HandleTransactionEndingChangeEvent(
+      const ImmutableEntryKernelMutationMap& mutations,
       BaseTransaction* trans) = 0;
   virtual void HandleTransactionCompleteChangeEvent(
       const ModelTypeBitSet& models_with_changes) = 0;