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 569a576428e3879b976e87227acb38bd03ec8fa7..56dd6815260dcd7fbfc978c1da9ed92f784da871 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"
@@ -180,6 +181,17 @@ class CORE_EXPORT ExecutionContext : public ContextLifecycleNotifier,
   void setReferrerPolicy(ReferrerPolicy);
   virtual ReferrerPolicy getReferrerPolicy() const { return m_referrerPolicy; }
 
+  void setErrorEventScriptState(
+      PassRefPtr<ScriptStateForErrorEvent> scriptState) {
+    m_errorEventScriptStates.append(scriptState);
+  }
+  void clearErrorEventScriptState() { m_errorEventScriptStates.removeLast(); }
+  ScriptState* errorEventScriptState() {
+    return m_errorEventScriptStates.size() != 0
+               ? m_errorEventScriptStates.last()->scriptState()
+               : nullptr;
+  }
+
  protected:
   ExecutionContext();
   virtual ~ExecutionContext();
@@ -195,6 +207,7 @@ class CORE_EXPORT ExecutionContext : public ContextLifecycleNotifier,
 
   bool m_inDispatchErrorEvent;
   HeapVector<Member<ErrorEvent>> m_pendingExceptions;
+  Vector<RefPtr<ScriptStateForErrorEvent>> m_errorEventScriptStates;
 
   bool m_activeDOMObjectsAreSuspended;
   bool m_activeDOMObjectsAreStopped;