Auto-rebaseline for r175599

http://src.chromium.org/viewvc/blink?view=revision&revision=175599

BUG=381242
TBR=wangxianzhu@chromium.org

Review URL: https://codereview.chromium.org/321503002

git-svn-id: svn://svn.chromium.org/blink/trunk@175628 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Implement navigator.hardwareConcurrency

This CL implements a |hardwareConcurrency| property on the
|navigator| object that returns the number of CPU cores the
machine has.

Intent-to-ship:
https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/xwl0ab20hVc

R=esprehn@chromium.org
BUG=369629

Review URL: https://codereview.chromium.org/262723002

git-svn-id: svn://svn.chromium.org/blink/trunk@175629 bbb929c8-8fbe-4397-9dbb-9b2b20218538