Chrome Early Loading Framework

chrome_elf.dll is shipped in Chrome's version directory to
ease updates, and is loaded early in chrome.exe's lifetime 
by making it a private assembly in a subfolder of 
chrome.exe's folder (see 
http://msdn.microsoft.com/library/aa374224.aspx).


BUG= http://crosbug.com/p/23889

Review URL: https://codereview.chromium.org/53793002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234795 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 234795