Linux: use the same path for Chrome package as previous major versions

This is a workaround for a bug that makes the browser try to load
resources from disk instead of using the zygote.

Also see https://groups.google.com/a/chromium.org/d/msg/chromium-dev/DBEqOORaRiw/pE0bNI6h0kcJ .

BUG=295103, 22703
R=mmoss@chromium.org

Review URL: https://codereview.chromium.org/25575003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@226312 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 226312