[part 2] Make classes and structures in modules fast-allocated.

Source/modules/mediastream/NavigatorMediaStream.h

 /*
     Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Library General Public License for more details.
 
     You should have received a copy of the GNU Library General Public License
     along with this library; see the file COPYING.LIB.  If not, write to
     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     Boston, MA 02110-1301, USA.
 */
 
 #ifndef NavigatorMediaStream_h
 #define NavigatorMediaStream_h
 
 #include "platform/heap/Handle.h"
+#include "wtf/Allocator.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class Dictionary;
 class ExceptionState;
 class MediaDeviceInfoCallback;
 class MediaStreamConstraints;
 class Navigator;
 class NavigatorUserMediaErrorCallback;
 class NavigatorUserMediaSuccessCallback;
 
 class NavigatorMediaStream {
+    STATIC_ONLY(NavigatorMediaStream);
 public:
     static void webkitGetUserMedia(Navigator&, const MediaStreamConstraints&, NavigatorUserMediaSuccessCallback*, NavigatorUserMediaErrorCallback*, ExceptionState&);
 
     static void getMediaDevices(Navigator&, MediaDeviceInfoCallback*, ExceptionState&);
-
-private:
-    NavigatorMediaStream();
-    ~NavigatorMediaStream();
 };
 
 } // namespace blink
 
 #endif // NavigatorMediaStream_h