Fix "report the exception" in Custom Elements V1

third_party/WebKit/Source/bindings/core/v8/ExceptionState.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 87 matching lines @@
     virtual void throwDOMException(const ExceptionCode&, const String& message);
     virtual void throwTypeError(const String& message);
     virtual void throwSecurityError(const String& sanitizedMessage, const String& unsanitizedMessage = String());
     virtual void throwRangeError(const String& message);
 
     bool hadException() const { return !m_exception.isEmpty() || m_code; }
     void clearException();
 
     ExceptionCode code() const { return m_code; }
     const String& message() const { return m_message; }
+    v8::Local<v8::Value> getException() { return m_exception.newLocal(m_isolate); }

[Yuki, 2016/08/18 07:57:09]

m_exception may be empty.
m_exception.isEmpty() ? v8::Local<v8::Value>() : m_exception.newLocal(m_isolate)

otherwise, CHECK(!m_exception.isEmpty()) or DCHECK at least.

[kojii, 2016/08/18 08:06:52]

Done.

 
     bool throwIfNeeded()
     {
         if (!hadException())
             return false;
         throwException();
         return true;
     }
 
     // This method clears out the exception which |this| has.
@@ skipping 56 matching lines @@
     TrackExceptionState(): ExceptionState(ExceptionState::UnknownContext, 0, 0, v8::Local<v8::Object>(), v8::Isolate::GetCurrent()) { }
     void throwDOMException(const ExceptionCode&, const String& message) override;
     void throwTypeError(const String& message = String()) override;
     void throwSecurityError(const String& sanitizedMessage, const String& unsanitizedMessage = String()) override;
     void throwRangeError(const String& message) override;
 };
 
 } // namespace blink
 
 #endif // ExceptionState_h