Purge ImplementsThreadSafeReferenceCounting() from the codebase now that Task is dead.

chrome_frame/test/ie_event_sink.h

 // Copyright (c) 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_FRAME_TEST_IE_EVENT_SINK_H_
 #define CHROME_FRAME_TEST_IE_EVENT_SINK_H_
 
 #include <atlbase.h>
 #include <atlwin.h>
 #include <exdispid.h>
@@ skipping 51 matching lines @@
 };
 
 // This class sets up event sinks to the IWebBrowser interface. It forwards
 // all events to its listener.
 class IEEventSink
     : public CComObjectRootEx<CComSingleThreadModel>,
       public IDispEventSimpleImpl<0, IEEventSink,
                                   &DIID_DWebBrowserEvents2>,
       public IUnknown {
  public:
-  // Needed to support PostTask.
-  static bool ImplementsThreadSafeReferenceCounting() {
-    return true;
-  }
-
   typedef IDispEventSimpleImpl<0, IEEventSink,
                                &DIID_DWebBrowserEvents2> DispEventsImpl;
   IEEventSink();
   ~IEEventSink();
 
   // Launches IE, sets up the sink to forward events to the listener, and
   // navigates to the given page.
   HRESULT LaunchIEAndNavigate(const std::wstring& navigate_url,
                               IEEventListener* listener);
 
@@ skipping 185 matching lines @@
     listener_ = listener;
   }
 
  protected:
   PropertyNotifySinkListener* listener_;
 };
 
 }  // namespace chrome_frame_test
 
 #endif  // CHROME_FRAME_TEST_IE_EVENT_SINK_H_