WebCrypto: properly normalize optional numeric parameters.

Source/bindings/v8/Dictionary.cpp

 /*
  * Copyright (C) 2010 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:
  *
  * 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
@@ skipping 303 matching lines @@
         return false;
 
     // FIXME: It is possible for this to throw in which case we'd be getting back
     //        an empty string and returning true when we should be returning false.
     //        See fast/dom/Geolocation/script-tests/argument-types.js for a similar
     //        example.
     value = WebCore::isUndefinedOrNull(v8Value) ? String() : toWebCoreString(v8Value);
     return true;
 }
 
+bool Dictionary::hasValue(const String& key) const
+{
+    v8::Local<v8::Value> v8Value;
+    return getKey(key, v8Value);
+}
+
 bool Dictionary::get(const String& key, RefPtr<Uint8Array>& value) const
 {
     v8::Local<v8::Value> v8Value;
     if (!getKey(key, v8Value))
         return false;
 
     value = 0;
     if (V8Uint8Array::HasInstance(v8Value, m_isolate, worldType(m_isolate)))
         value = V8Uint8Array::toNative(v8::Handle<v8::Object>::Cast(v8Value));
     return true;
@@ skipping 266 matching lines @@
         v8::Local<v8::String> key = properties->Get(i)->ToString();
         if (!options->Has(key))
             continue;
         names.append(toWebCoreString(key));
     }
 
     return true;
 }
 
 } // namespace WebCore