[DevTools] Event Listeners Sidebar shows window listeners

Source/bindings/core/v8/custom/V8InjectedScriptHostCustom.cpp

Index: Source/bindings/core/v8/custom/V8InjectedScriptHostCustom.cpp
diff --git a/Source/bindings/core/v8/custom/V8InjectedScriptHostCustom.cpp b/Source/bindings/core/v8/custom/V8InjectedScriptHostCustom.cpp
index 8b452af03f32c73f39a70ae1619c073f9095e8b6..20a33bf95787600b8dc392d0b053da71d3839990 100644
--- a/Source/bindings/core/v8/custom/V8InjectedScriptHostCustom.cpp
+++ b/Source/bindings/core/v8/custom/V8InjectedScriptHostCustom.cpp
@@ -80,6 +80,23 @@ ScriptValue InjectedScriptHost::nodeAsScriptValue(ScriptState* scriptState, Node
     return ScriptValue(scriptState, toV8(node, scriptState->context()->Global(), isolate));
 }
 
+EventTarget* InjectedScriptHost::scriptValueAsEventTarget(ScriptState* scriptState, ScriptValue value)
+{
+    ScriptState::Scope scope(scriptState);
+    if (!value.isObject() || value.isNull())
+        return nullptr;
+    v8::Isolate* isolate = scriptState->isolate();
+    EventTarget* target = V8EventTarget::toImplWithTypeCheck(isolate, v8::Local<v8::Object>::Cast(value.v8Value()));
+
+    // We need to handle a LocalDOMWindow specially, because a LocalDOMWindow wrapper exists on a prototype chain.
+    if (!target)
+        target = toDOMWindow(isolate, v8::Local<v8::Object>::Cast(value.v8Value()));
+
+    if (!target || !target->executionContext())
+        return nullptr;
+    return target;
+}
+
 void V8InjectedScriptHost::inspectedObjectMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     if (info.Length() < 1)