Dispatching errors across iframes don't match webplatform tests

third_party/WebKit/Source/core/dom/ExecutionContext.h

Index: third_party/WebKit/Source/core/dom/ExecutionContext.h
diff --git a/third_party/WebKit/Source/core/dom/ExecutionContext.h b/third_party/WebKit/Source/core/dom/ExecutionContext.h
index 0310212da52275bdc3bd5182e52a02044dd4ac3a..0cffa7e9523c36582359feae875a5edb551672fd 100644
--- a/third_party/WebKit/Source/core/dom/ExecutionContext.h
+++ b/third_party/WebKit/Source/core/dom/ExecutionContext.h
@@ -28,6 +28,7 @@
 #ifndef ExecutionContext_h
 #define ExecutionContext_h
 
+#include "bindings/core/v8/ScriptState.h"
 #include "core/CoreExport.h"
 #include "core/dom/ContextLifecycleNotifier.h"
 #include "core/dom/ContextLifecycleObserver.h"
@@ -179,6 +180,10 @@ class CORE_EXPORT ExecutionContext : public ContextLifecycleNotifier,
   void setReferrerPolicy(ReferrerPolicy);
   virtual ReferrerPolicy getReferrerPolicy() const { return m_referrerPolicy; }
 
+  void setErrorEventScriptState(ScriptState* scriptState) { m_errorEventScriptState = scriptState; }
+  void clearErrorEventScriptState() { m_errorEventScriptState.clear(); }
+  ScriptState* errorEventScriptState() { return m_errorEventScriptState.get(); }
+
  protected:
   ExecutionContext();
   virtual ~ExecutionContext();
@@ -194,6 +199,7 @@ class CORE_EXPORT ExecutionContext : public ContextLifecycleNotifier,
 
   bool m_inDispatchErrorEvent;
   HeapVector<Member<ErrorEvent>> m_pendingExceptions;
+  RefPtr<ScriptState> m_errorEventScriptState;
 
   bool m_activeDOMObjectsAreSuspended;
   bool m_activeDOMObjectsAreStopped;