Componentize protocol_event_observer

chrome/browser/sync/protocol_event_observer.h

Index: chrome/browser/sync/protocol_event_observer.h
diff --git a/chrome/browser/sync/protocol_event_observer.h b/chrome/browser/sync/protocol_event_observer.h
deleted file mode 100644
index 3ed4095fb72990dc3e3782fb0b53f54c584eb81f..0000000000000000000000000000000000000000
--- a/chrome/browser/sync/protocol_event_observer.h
+++ /dev/null
@@ -1,24 +0,0 @@
-// Copyright 2014 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_PROTOCOL_EVENT_OBSERVER_H_
-#define CHROME_BROWSER_SYNC_PROTOCOL_EVENT_OBSERVER_H_
-
-namespace syncer {
-class ProtocolEvent;
-}
-
-namespace browser_sync {
-
-class ProtocolEventObserver {
- public:
-  ProtocolEventObserver();
-  virtual ~ProtocolEventObserver();
-
-  virtual void OnProtocolEvent(const syncer::ProtocolEvent& event) = 0;
-};
-
-}  // namespace browser_sync
-
-#endif  // CHROME_BROWSER_SYNC_PROTOCOL_EVENT_OBSERVER_H_