PreRead chrome.dll only for release builds.
PreRead chrome.dll only for release builds.

Bug=45510

Review URL: http://codereview.chromium.org/2918003

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@51988 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser