Establish correct names for about:tracking profiler
Establish correct names for about:tracking profiler

This file was mistakenly ommited from the recent landing,
so the thread names were not being set (all threads
other than the main thread wer assigned sequential 
"WorkerThread-N" names).

r=eroman
Review URL: http://codereview.chromium.org/8315010

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@105814 0039d316-1c4b-4281-b951-d872f2087c98

ropik/chromium,gavinp/chromium,adobe/chromium,yitian134/chromium,yitian134/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,yitian134/chromium,yitian134/chromium,ropik/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,adobe/chromium,ropik/chromium,ropik/chromium,gavinp/chromium,yitian134/chromium,gavinp/chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,adobe/chromium,adobe/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,gavinp/chromium,adobe/chromium,ropik/chromium,ropik/chromium,yitian134/chromium,ropik/chromium,ropik/chromium