[sync] Divorce DataTypeManager from NotificationService notifications by creating a new DataTypeMa…

chrome/browser/sync/glue/data_type_manager_observer.h

Index: chrome/browser/sync/glue/data_type_manager_observer.h
diff --git a/chrome/browser/sync/glue/data_type_manager_observer.h b/chrome/browser/sync/glue/data_type_manager_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..6c6acd619d4b801c8daaebdbc4a21856bdabae60
--- /dev/null
+++ b/chrome/browser/sync/glue/data_type_manager_observer.h
@@ -0,0 +1,25 @@
+// Copyright 2012 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_OBSERVER_H_
+#define CHROME_BROWSER_SYNC_GLUE_DATA_TYPE_MANAGER_OBSERVER_H_
+
+namespace browser_sync {
+
+// Various data type configuration events can be consumed by observing the
+// DataTypeManager through this interface.
+class DataTypeManagerObserver {
+ public:
+  virtual void OnConfigureBlocked() = 0;
+  virtual void OnConfigureDone() = 0;
+  virtual void OnConfigureRetry() = 0;
+  virtual void OnConfigureStart() = 0;
+
+ protected:
+  virtual ~DataTypeManagerObserver() { }
+};
+
+}  // namespace browser_sync
+
+#endif  // CHROME_BROWSER_SYNC_GLUE_DATA_TYPE_MANAGER_OBSERVER_H_