Implement navigator.hardwareConcurrency

Source/core/frame/NavigatorCPU.h

Index: Source/core/frame/NavigatorCPU.h
diff --git a/Source/core/frame/NavigatorCPU.h b/Source/core/frame/NavigatorCPU.h
new file mode 100644
index 0000000000000000000000000000000000000000..1bf35d9e4631b3f494ef9d9ee5fe0d9079551313
--- /dev/null
+++ b/Source/core/frame/NavigatorCPU.h
@@ -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.
+
+#ifndef NavigatorCPU_h
+#define NavigatorCPU_h
+
+namespace WebCore {
+
+class NavigatorCPU {
+public:
+    unsigned hardwareConcurrency() const;
+};
+
+} // namespace WebCore
+
+#endif // NavigatorCPU_h