binding: Updates ExceptionStatePlaceholder according to ExceptionState.

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 140 matching lines @@
 };
 
 // NonThrowableExceptionState never allow call sites to throw an exception.
 // Should be used if an exception must not be thrown.
 class CORE_EXPORT NonThrowableExceptionState final : public ExceptionState {
 public:
     NonThrowableExceptionState()
         : ExceptionState(nullptr, ExceptionState::UnknownContext, nullptr, nullptr) { }
 
     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 throwTypeError(const String& message) override;
+    void throwSecurityError(const String& sanitizedMessage, const String& unsanitizedMessage) override;
     void throwRangeError(const String& message) override;
     void rethrowV8Exception(v8::Local<v8::Value>) override;
 };
 
 // TrackExceptionState never actually throws an exception, but just records
 // whether a call site tried to throw an exception or not.  Should be used
 // if any exceptions must be ignored.
 class CORE_EXPORT TrackExceptionState final : public ExceptionState {
 public:
     TrackExceptionState()
         : ExceptionState(nullptr, ExceptionState::UnknownContext, nullptr, nullptr) { }
     ~TrackExceptionState()
     {
         // Prevent the base class throw an exception.
         if (hadException()) {
             clearException();
         }
     }
 
     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 throwTypeError(const String& message) override;
+    void throwSecurityError(const String& sanitizedMessage, const String& unsanitizedMessage) override;
     void throwRangeError(const String& message) override;
     void rethrowV8Exception(v8::Local<v8::Value>) override;
 };
 
 } // namespace blink
 
 #endif // ExceptionState_h