DevTools: Put EventDispatch type into the data object.

Source/core/inspector/InspectorTraceEvents.cpp

Index: Source/core/inspector/InspectorTraceEvents.cpp
diff --git a/Source/core/inspector/InspectorTraceEvents.cpp b/Source/core/inspector/InspectorTraceEvents.cpp
index dfc934ff1d583dadf9bbb0ed6426ff5d0c3aa327..43e55ae5a668a31de99f5c7f6ac7aff30d268af5 100644
--- a/Source/core/inspector/InspectorTraceEvents.cpp
+++ b/Source/core/inspector/InspectorTraceEvents.cpp
@@ -8,6 +8,7 @@
 #include "bindings/core/v8/ScriptCallStackFactory.h"
 #include "bindings/core/v8/ScriptGCEvent.h"
 #include "bindings/core/v8/ScriptSourceCode.h"
+#include "core/events/Event.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/inspector/IdentifiersFactory.h"
@@ -338,4 +339,9 @@ PassRefPtr<TraceEvent::ConvertableToTraceFormat> InspectorCallStackEvent::curren
     return adoptRef(new JSCallStack(createScriptCallStack(ScriptCallStack::maxCallStackSizeToCapture, true)));
 }
 
+PassRefPtr<TraceEvent::ConvertableToTraceFormat> InspectorEventDispatchEvent::data(const Event& event)
+{
+    return TracedValue().setString("type", event.type()).finish();
+}
+
 }