Add counters for add/removeEventListener() called with one argument

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

Index: Source/bindings/core/v8/custom/V8EventTargetCustom.cpp
diff --git a/Source/bindings/core/v8/custom/V8EventTargetCustom.cpp b/Source/bindings/core/v8/custom/V8EventTargetCustom.cpp
index e49d1da5be0a0a93614eb3d6f4b59a7f1e64c423..97ae719532d8f7bc7cb8bebaaf27e4314e765f60 100644
--- a/Source/bindings/core/v8/custom/V8EventTargetCustom.cpp
+++ b/Source/bindings/core/v8/custom/V8EventTargetCustom.cpp
@@ -32,15 +32,32 @@
 #include "bindings/core/v8/V8EventTarget.h"
 
 #include "bindings/core/v8/V8Window.h"
+#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);

[haraken, 2015/07/10 09:32:20]

You decided not to throw error and just want to take user counters, right?

[philipj_slow, 2015/07/10 09:41:27]

Yes, the purpose of this is to actually collect the use counter data to prove
that making these arguments required will not break. Normally this is way
overkill, but the first attempt to fix it failed, so...

+    }
+}
+
 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);
+    }
+}
+
 void V8EventTarget::removeEventListenerMethodEpilogueCustom(const v8::FunctionCallbackInfo<v8::Value>& info, EventTarget* impl)
 {
     if (info.Length() >= 2 && info[1]->IsObject() && !impl->toNode())