Events should have an initialized flag.

third_party/WebKit/Source/core/events/Event.h

Index: third_party/WebKit/Source/core/events/Event.h
diff --git a/third_party/WebKit/Source/core/events/Event.h b/third_party/WebKit/Source/core/events/Event.h
index 505c055926717420d2ddbc9569eb29539f4fc626..f7a4ee3cfa1af231911e0a3e73998e3b2d99854e 100644
--- a/third_party/WebKit/Source/core/events/Event.h
+++ b/third_party/WebKit/Source/core/events/Event.h
@@ -137,6 +137,7 @@ public:
 
     void stopPropagation() { m_propagationStopped = true; }
     void stopImmediatePropagation() { m_immediatePropagationStopped = true; }
+    void unsetInitializedFlag() { m_initialized = false; }
 
     // IE Extensions
     EventTarget* srcElement() const { return target(); } // MSIE extension - "the object that fired the event"
@@ -170,6 +171,7 @@ public:
 
     bool propagationStopped() const { return m_propagationStopped || m_immediatePropagationStopped; }
     bool immediatePropagationStopped() const { return m_immediatePropagationStopped; }
+    bool initialized() { return m_initialized; }

[tkent, 2016/05/02 00:19:27]

This function should be named as |wasInitialized()|

[ramya.v, 2016/05/02 05:31:44]

Done.

 
     bool defaultPrevented() const { return m_defaultPrevented; }
     virtual void preventDefault();
@@ -239,6 +241,7 @@ private:
     unsigned m_defaultPrevented:1;
     unsigned m_defaultHandled:1;
     unsigned m_cancelBubble:1;
+    unsigned m_initialized:1;

[tkent, 2016/05/02 00:19:27]

This member should be named as |m_wasInitialized|

[ramya.v, 2016/05/02 05:31:44]

Done.

     unsigned m_isTrusted : 1;
     unsigned m_handlingPassive : 1;