Improve Crypto::getRandomValues exception messages.

Source/wtf/ArrayBufferView.h

 /*
  * Copyright (C) 2009 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 34 matching lines @@
         TypeUint8Clamped,
         TypeInt16,
         TypeUint16,
         TypeInt32,
         TypeUint32,
         TypeFloat32,
         TypeFloat64,
         TypeDataView
     };
     virtual ViewType getType() const = 0;
+    const char* typeName();
 
     PassRefPtr<ArrayBuffer> buffer() const
     {
         return m_buffer;
     }
 
     void* baseAddress() const
     {
         return m_baseAddress;
     }
@@ skipping 135 matching lines @@
         end = start;
     *offset = static_cast<unsigned>(start);
     *length = static_cast<unsigned>(end - start);
 }
 
 } // namespace WTF
 
 using WTF::ArrayBufferView;
 
 #endif // ArrayBufferView_h