Expose crypto.getRandomValues() to workers.

Source/bindings/v8/custom/V8CryptoCustom.cpp

 /*
  * Copyright (C) 2012 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
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 17 matching lines @@
 #include "V8ArrayBufferView.h"
 #include "bindings/v8/V8Binding.h"
 #include "bindings/v8/V8Utilities.h"
 #include "core/dom/ExceptionCode.h"
 #include "modules/crypto/Crypto.h"
 
 #include "wtf/ArrayBufferView.h"
 
 namespace WebCore {
 
+// This custom binding is shared by V8WorkerCrypto. As such:
+//   * Do not call V8Crypto::toNative()
+//   * Must be threadsafe

[abarth-chromium, 2013/06/13 21:48:33]

It's too bad the code generator isn't smart enough to generate this code.

 void V8Crypto::getRandomValuesMethodCustom(const v8::FunctionCallbackInfo<v8::Value>& args)
 {
     if (args.Length() < 1) {
         throwNotEnoughArgumentsError(args.GetIsolate());
         return;
     }
 
     v8::Handle<v8::Value> buffer = args[0];
     if (!V8ArrayBufferView::HasInstance(buffer, args.GetIsolate(), worldType(args.GetIsolate()))) {
         throwTypeError("First argument is not an ArrayBufferView", args.GetIsolate());
         return;
     }
 
     ArrayBufferView* arrayBufferView = V8ArrayBufferView::toNative(v8::Handle<v8::Object>::Cast(buffer));
     ASSERT(arrayBufferView);
 
-    Crypto* crypto = V8Crypto::toNative(args.Holder());
     ExceptionCode ec = 0;
-    crypto->getRandomValues(arrayBufferView, ec);
+    Crypto::getRandomValues(arrayBufferView, ec);
 
     if (ec) {
         setDOMException(ec, args.GetIsolate());
         return;
     }
 
     v8SetReturnValue(args, buffer);
 }
 
 } // namespace WebCore