Improve Crypto::getRandomValues exception messages.

Source/wtf/ArrayBufferView.cpp

 /*
  * 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 37 matching lines @@
     if (m_buffer)
         m_buffer->removeView(this);
 }
 
 void ArrayBufferView::neuter()
 {
     m_buffer = 0;
     m_byteOffset = 0;
 }
 
+const char* ArrayBufferView::typeName()
+{
+    switch (getType()) {
+    case TypeInt8:
+        return "Int8";
+        break;
+    case TypeUint8:
+        return "UInt8";
+        break;
+    case TypeUint8Clamped:
+        return "UInt8Clamped";
+        break;
+    case TypeInt16:
+        return "Int16";
+        break;
+    case TypeUint16:
+        return "UInt16";
+        break;
+    case TypeInt32:
+        return "Int32";
+        break;
+    case TypeUint32:
+        return "Uint32";
+        break;
+    case TypeFloat32:
+        return "Float32";
+        break;
+    case TypeFloat64:
+        return "Float64";
+        break;
+    case TypeDataView:
+        return "DataView";
+        break;
+    }
+    ASSERT_NOT_REACHED();
+    return "Unknown";
 }
+
+}