Catch uncaught promise rejections from V8 and log to console.

Source/core/testing/NullExecutionContext.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NullExecutionContext_h
 #define NullExecutionContext_h
 
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/SecurityContext.h"
 #include "core/events/EventQueue.h"
@@ skipping 19 matching lines @@
     virtual bool tasksNeedSuspension() OVERRIDE { return m_tasksNeedSuspension; }
     void setTasksNeedSuspension(bool flag) { m_tasksNeedSuspension = flag; }
 
     virtual void reportBlockedScriptExecutionToInspector(const String& directiveText) OVERRIDE { }
     virtual void didUpdateSecurityOrigin() OVERRIDE { }
     virtual SecurityContext& securityContext() OVERRIDE { return *this; }
 
     double timerAlignmentInterval() const;
 
     virtual void addConsoleMessage(PassRefPtrWillBeRawPtr<ConsoleMessage>) OVERRIDE { }
-    virtual void logExceptionToConsole(const String& errorMessage, int scriptId, const String& sourceURL, int lineNumber, int columnNumber, PassRefPtrWillBeRawPtr<ScriptCallStack>) OVERRIDE { }
+    virtual void logExceptionToConsole(const String& errorMessage, int scriptId, const String& sourceURL, int lineNumber, int columnNumber, PassRefPtrWillBeRawPtr<ScriptCallStack>, PassRefPtrWillBeRawPtr<ScriptArguments>) OVERRIDE { }
 
     void trace(Visitor* visitor)
     {
         visitor->trace(m_queue);
         ExecutionContext::trace(visitor);
     }
 
 #if !ENABLE(OILPAN)
     using RefCounted<NullExecutionContext>::ref;
     using RefCounted<NullExecutionContext>::deref;
 
     virtual void refExecutionContext() OVERRIDE { ref(); }
     virtual void derefExecutionContext() OVERRIDE { deref(); }
 #endif
 
 protected:
     virtual const KURL& virtualURL() const OVERRIDE { return m_dummyURL; }
     virtual KURL virtualCompleteURL(const String&) const OVERRIDE { return m_dummyURL; }
 
 private:
     bool m_tasksNeedSuspension;
     OwnPtrWillBeMember<EventQueue> m_queue;
 
     KURL m_dummyURL;
 };
 
 } // namespace blink
 
 #endif // NullExecutionContext_h