Experimental pre-reading optimization to run on perf bots

Pre-reading chrome.dll prior to calling loadlibrary has shown significant
improvement int he startup performance. Temporarily enabling this for 
headless mode so that we can try out the effect on the perf bots.



Review URL: http://codereview.chromium.org/2814019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@50386 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed