Usage counter for add/removeEventListener third argument.

third_party/WebKit/Source/bindings/core/v8/custom/V8EventTargetCustom.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 24 matching lines @@
 #include "core/frame/UseCounter.h"
 
 namespace blink {
 
 void V8EventTarget::addEventListenerMethodPrologueCustom(const v8::FunctionCallbackInfo<v8::Value>& info, EventTarget*)
 {
     if (info.Length() < 2) {
         UseCounter::countIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()),
             info.Length() == 0 ? UseCounter::AddEventListenerNoArguments : UseCounter::AddEventListenerOneArgument);
     }
+    if (info.Length() >= 3 && info[2]->IsObject()) {
+        UseCounter::countIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()),
+            UseCounter::AddEventListenerThirdArgumentIsObject);
+    }
 }
 
 void V8EventTarget::addEventListenerMethodEpilogueCustom(const v8::FunctionCallbackInfo<v8::Value>& info, EventTarget* impl)
 {
     if (info.Length() >= 2 && info[1]->IsObject() && !impl->toNode())
         addHiddenValueToArray(info.GetIsolate(), info.Holder(), info[1], V8EventTarget::eventListenerCacheIndex);
 }
 
 void V8EventTarget::removeEventListenerMethodPrologueCustom(const v8::FunctionCallbackInfo<v8::Value>& info, EventTarget*)
 {
     if (info.Length() < 2) {
         UseCounter::countIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()),
             info.Length() == 0 ? UseCounter::RemoveEventListenerNoArguments : UseCounter::RemoveEventListenerOneArgument);
     }
+    if (info.Length() >= 3 && info[2]->IsObject()) {
+        UseCounter::countIfNotPrivateScript(info.GetIsolate(), callingExecutionContext(info.GetIsolate()),
+            UseCounter::RemoveEventListenerThirdArgumentIsObject);
+    }
 }
 
 void V8EventTarget::removeEventListenerMethodEpilogueCustom(const v8::FunctionCallbackInfo<v8::Value>& info, EventTarget* impl)
 {
     if (info.Length() >= 2 && info[1]->IsObject() && !impl->toNode())
         removeHiddenValueFromArray(info.GetIsolate(), info.Holder(), info[1], V8EventTarget::eventListenerCacheIndex);
 }
 
 } // namespace blink