sync: Implement per-type commit interface

sync/engine/process_commit_response_command.h

Index: sync/engine/process_commit_response_command.h
diff --git a/sync/engine/process_commit_response_command.h b/sync/engine/process_commit_response_command.h
index 7176da1692d8e94162decd578548f1db1bd29262..86a119d3788a2b64cf20b618571251ef615f55d3 100644
--- a/sync/engine/process_commit_response_command.h
+++ b/sync/engine/process_commit_response_command.h
@@ -16,10 +16,6 @@
 
 namespace syncer {
 
-namespace sessions {
-class OrderedCommitSet;
-}
-
 namespace syncable {
 class Id;
 class ModelNeutralWriteTransaction;
@@ -39,37 +35,17 @@ class Directory;
 // trouble processing the request.
 //
 // See SyncerCommand documentation for more info.
-class SYNC_EXPORT_PRIVATE ProcessCommitResponseCommand : public SyncerCommand {
+class SYNC_EXPORT_PRIVATE ProcessCommitResponseCommand {
  public:
-
-  // The commit_set parameter contains references to all the items which were
-  // to be committed in this batch.
-  //
-  // The commmit_message parameter contains the message that was sent to the
-  // server.
-  //
-  // The commit_response parameter contains the response received from the
-  // server.  This may be uninitialized if we were unable to contact the server
-  // or a serious error was encountered.
-  ProcessCommitResponseCommand(
-      const sessions::OrderedCommitSet& commit_set,
-      const sync_pb::ClientToServerMessage& commit_message,
-      const sync_pb::ClientToServerResponse& commit_response);
-  virtual ~ProcessCommitResponseCommand();
-
- protected:
-  // SyncerCommand implementation.
-  virtual SyncerError ExecuteImpl(sessions::SyncSession* session) OVERRIDE;
-
- private:
-  sync_pb::CommitResponse::ResponseType ProcessSingleCommitResponse(
+  static sync_pb::CommitResponse::ResponseType ProcessSingleCommitResponse(
       syncable::ModelNeutralWriteTransaction* trans,
       const sync_pb::CommitResponse_EntryResponse& pb_commit_response,
       const sync_pb::SyncEntity& pb_committed_entry,
       int64 metahandle,
       std::set<syncable::Id>* deleted_folders);
 
-  void ProcessSuccessfulCommitResponse(
+ private:
+  static void ProcessSuccessfulCommitResponse(
       const sync_pb::SyncEntity& committed_entry,
       const sync_pb::CommitResponse_EntryResponse& entry_response,
       const syncable::Id& pre_commit_id,
@@ -78,7 +54,7 @@ class SYNC_EXPORT_PRIVATE ProcessCommitResponseCommand : public SyncerCommand {
 
   // Update the BASE_VERSION and SERVER_VERSION, post-commit.
   // Helper for ProcessSuccessfulCommitResponse.
-  bool UpdateVersionAfterCommit(
+  static bool UpdateVersionAfterCommit(
       const sync_pb::SyncEntity& committed_entry,
       const sync_pb::CommitResponse_EntryResponse& entry_response,
       const syncable::Id& pre_commit_id,
@@ -86,33 +62,24 @@ class SYNC_EXPORT_PRIVATE ProcessCommitResponseCommand : public SyncerCommand {
 
   // If the server generated an ID for us during a commit, apply the new ID.
   // Helper for ProcessSuccessfulCommitResponse.
-  bool ChangeIdAfterCommit(
+  static bool ChangeIdAfterCommit(
       const sync_pb::CommitResponse_EntryResponse& entry_response,
       const syncable::Id& pre_commit_id,
       syncable::ModelNeutralMutableEntry* local_entry);
 
   // Update the SERVER_ fields to reflect the server state after committing.
   // Helper for ProcessSuccessfulCommitResponse.
-  void UpdateServerFieldsAfterCommit(
+  static void UpdateServerFieldsAfterCommit(
       const sync_pb::SyncEntity& committed_entry,
       const sync_pb::CommitResponse_EntryResponse& entry_response,
       syncable::ModelNeutralMutableEntry* local_entry);
 
   // Helper to extract the final name from the protobufs.
-  const std::string& GetResultingPostCommitName(
+  static const std::string& GetResultingPostCommitName(
       const sync_pb::SyncEntity& committed_entry,
       const sync_pb::CommitResponse_EntryResponse& entry_response);
 
-  // Helper to clean up in case of failure.
-  void ClearSyncingBits(
-      syncable::Directory *dir,
-      const std::vector<syncable::Id>& commit_ids);
-
-  const sessions::OrderedCommitSet& commit_set_;
-  const sync_pb::ClientToServerMessage& commit_message_;
-  const sync_pb::ClientToServerResponse& commit_response_;
-
-  DISALLOW_COPY_AND_ASSIGN(ProcessCommitResponseCommand);
+  DISALLOW_IMPLICIT_CONSTRUCTORS(ProcessCommitResponseCommand);
 };
 
 }  // namespace syncer