Do not zero-initialize RawPtr.

Source/core/page/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 3572 matching lines @@
     // Holds the complete set of touches on the screen and will be used as the 'touches' list in the JS event.
     RefPtrWillBeRawPtr<TouchList> touches = TouchList::create();
 
     // A different view on the 'touches' list above, filtered and grouped by event target. Used for the
     // 'targetTouches' list in the JS event.
     typedef WillBeHeapHashMap<EventTarget*, RefPtrWillBeMember<TouchList> > TargetTouchesHeapMap;
     TargetTouchesHeapMap touchesByTarget;
 
     // Array of touches per state, used to assemble the 'changedTouches' list in the JS event.
     typedef HashSet<RefPtr<EventTarget> > EventTargetSet;
     struct {

[haraken, 2014/03/24 13:52:54]

Won't this be stack-allocated as well?

[Mads Ager (chromium), 2014/03/24 14:27:30]

Yes it will. I'm not sure what the plugin will say about this one, but using a
Member here and marking it STACK_ALLOCATED should be fine. Done.

         // The touches corresponding to the particular change state this struct instance represents.
-        RefPtrWillBeRawPtr<TouchList> m_touches;
+        RefPtrWillBeRawPtr<TouchList> m_touches = nullptr;
         // Set of targets involved in m_touches.
         EventTargetSet m_targets;
     } changedTouches[PlatformTouchPoint::TouchStateEnd];
 
     const Vector<PlatformTouchPoint>& points = event.touchPoints();
 
     UserGestureIndicator gestureIndicator(DefinitelyProcessingUserGesture);
 
     unsigned i;
     bool freshTouchEvents = true;
@@ skipping 418 matching lines @@
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(MACOSX)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace WebCore