Dispatching errors across iframes don't match webplatform tests

third_party/WebKit/Source/bindings/core/v8/V8EventListener.cpp

Index: third_party/WebKit/Source/bindings/core/v8/V8EventListener.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8EventListener.cpp b/third_party/WebKit/Source/bindings/core/v8/V8EventListener.cpp
index 9acda710530f48c82a190e91d02430a41fcd750f..d268e8d70e5c923c3f47473de4cd14bba0975ccb 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8EventListener.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/V8EventListener.cpp
@@ -106,6 +106,7 @@ v8::Local<v8::Value> V8EventListener::callListenerFunction(
       !frame->script().canExecuteScripts(AboutToExecuteScript))
     return v8::Local<v8::Value>();
 
+  ScriptStateForErrorEvent scope(handlerFunction->CreationContext());

[haraken, 2016/11/02 01:40:18]

Add a comment about what this is doing.

By the way, are you sure that we need to enter the scope only in
V8EventListener::callListenerFunction? I'm wondering if we should move the scope
into V8ScriptRunner::callFunction, because I guess this would be a generic
problem for all function calls from Blink to V8.

   v8::Local<v8::Value> parameters[1] = {jsEvent};
   v8::Local<v8::Value> result;
   if (!V8ScriptRunner::callFunction(handlerFunction, frame->document(),