Implement navigator.hardwareConcurrency

Source/core/frame/NavigatorCPU.cpp

Index: Source/core/frame/NavigatorCPU.cpp
diff --git a/Source/core/frame/NavigatorCPU.cpp b/Source/core/frame/NavigatorCPU.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..a5bee3d1fc7013f55765067bae6267fa940c42a2
--- /dev/null
+++ b/Source/core/frame/NavigatorCPU.cpp
@@ -0,0 +1,17 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "core/frame/NavigatorCPU.h"
+
+#include "public/platform/Platform.h"
+
+namespace WebCore {
+
+unsigned NavigatorCPU::hardwareConcurrency() const
+{
+    return blink::Platform::current()->numberOfProcessors();
+}
+
+} // namespace WebCore