Change CRASH deference address to 0xfbadbeef from 0xbbadbeef.

I noticed that WebKit had done this.
0xbbadbeef might be mapped on 32-bit Windows. 0xfbadbeef will not be.

Review URL: https://codereview.chromium.org/105813005

git-svn-id: svn://svn.chromium.org/blink/trunk@163975 bbb929c8-8fbe-4397-9dbb-9b2b20218538