Expose crypto.getRandomValues() to workers.

Source/modules/crypto/WorkerCrypto.h

Index: Source/modules/crypto/WorkerCrypto.h
diff --git a/Source/modules/webmidi/MIDIErrorCallback.h b/Source/modules/crypto/WorkerCrypto.h
similarity index 81%
copy from Source/modules/webmidi/MIDIErrorCallback.h
copy to Source/modules/crypto/WorkerCrypto.h
index 2684f7bd58b9d03d854c4da09a60386f00039cd7..5bbb3f5d39eba918f40aab6f91439d3993547e81 100644
--- a/Source/modules/webmidi/MIDIErrorCallback.h
+++ b/Source/modules/crypto/WorkerCrypto.h
@@ -28,21 +28,26 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef MIDIErrorCallback_h
-#define MIDIErrorCallback_h
+#ifndef WorkerCrypto_h
+#define WorkerCrypto_h
 
+#include "bindings/v8/ScriptWrappable.h"
+#include "wtf/Forward.h"
+#include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
-class DOMError;
+typedef int ExceptionCode;
 
-class MIDIErrorCallback : public RefCounted<MIDIErrorCallback> {
+class WorkerCrypto : public ScriptWrappable, public RefCounted<WorkerCrypto> {
 public:
-    virtual ~MIDIErrorCallback() { }
-    virtual bool handleEvent(DOMError*) = 0;
+    static PassRefPtr<WorkerCrypto> create() { return adoptRef(new WorkerCrypto()); }
+
+private:
+    WorkerCrypto();
 };
 
-} // namespace WebCore
+}
 
-#endif // MIDIErrorCallback_h
+#endif