Set a base address for chrome_elf to avoid base address collisions with chrome_dll.

NOTRY=true
BUG=318691

Review URL: https://codereview.chromium.org/75483002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@235835 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 235835