sync: rewrite DataTypeManagerImpl without pause/resume logic.

chrome/browser/sync/glue/data_type_manager_impl2.h

Index: chrome/browser/sync/glue/data_type_manager_impl2.h
diff --git a/chrome/browser/sync/glue/data_type_manager_impl2.h b/chrome/browser/sync/glue/data_type_manager_impl2.h
new file mode 100644
index 0000000000000000000000000000000000000000..570a38b1fc6ad2f185bee56572c0bec064ba777f
--- /dev/null
+++ b/chrome/browser/sync/glue/data_type_manager_impl2.h
@@ -0,0 +1,70 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_SYNC_GLUE_DATA_TYPE_MANAGER_IMPL2_H__
+#define CHROME_BROWSER_SYNC_GLUE_DATA_TYPE_MANAGER_IMPL2_H__
+#pragma once
+
+#include "chrome/browser/sync/glue/data_type_manager.h"
+
+#include <map>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/task.h"
+
+namespace browser_sync {
+
+class DataTypeController;
+class SyncBackendHost;
+
+class DataTypeManagerImpl2 : public DataTypeManager {
+ public:
+  DataTypeManagerImpl2(SyncBackendHost* backend,
+                       const DataTypeController::TypeMap& controllers);
+  virtual ~DataTypeManagerImpl2();
+
+  // DataTypeManager interface.
+  virtual void Configure(const TypeSet& desired_types);
+  virtual void Stop();
+  virtual const DataTypeController::TypeMap& controllers();
+  virtual State state();
+
+ private:
+  // Starts the next data type in the kStartOrder list, indicated by
+  // the current_type_ member.  If there are no more data types to
+  // start, the stashed start_callback_ is invoked.
+  void StartNextType();
+
+  // Callback passed to each data type controller on startup.
+  void TypeStartCallback(DataTypeController::StartResult result);
+
+  // Stops all data types.
+  void FinishStop();
+  void FinishStopAndNotify(ConfigureResult result);
+
+  void Restart();
+  void DownloadReady();
+  void NotifyStart();
+  void NotifyDone(ConfigureResult result);
+
+  SyncBackendHost* backend_;
+  // Map of all data type controllers that are available for sync.
+  // This list is determined at startup by various command line flags.
+  const DataTypeController::TypeMap controllers_;
+  State state_;
+  DataTypeController* current_dtc_;
+  std::map<syncable::ModelType, int> start_order_;
+  TypeSet last_requested_types_;
+  std::vector<DataTypeController*> needs_start_;
+  std::vector<DataTypeController*> needs_stop_;
+
+  ScopedRunnableMethodFactory<DataTypeManagerImpl2> method_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(DataTypeManagerImpl2);
+};
+
+}  // namespace browser_sync
+
+#endif  // CHROME_BROWSER_SYNC_GLUE_DATA_TYPE_MANAGER_IMPL2_H__