Turn on RTTI for the Mac dump_syms.  Breakpad r550 requires it, and after considering the alternatives, I've decided that it's not terrible.  This code does not make it into the Chrome build, it's only used for the symbol dumper.
Turn on RTTI for the Mac dump_syms.  Breakpad r550 requires it, and after
considering the alternatives, I've decided that it's not terrible.  This code
does not make it into the Chrome build, it's only used for the symbol dumper.

BUG=none
TEST=Mac official build
Review URL: http://codereview.chromium.org/1535005

git-svn-id: http://src.chromium.org/svn/trunk/src@43092 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

Former-commit-id: 6f65a6efe5db9ee759a7e2074f0db7be8a444f00
meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser,meego-tablet-ux/meego-app-browser