Build for Mac in the Release configuration at -O3

Build for Mac in the Release configuration at -O3

This is an experiment to get a few test cycles in so that we can measure the
impact and evaluate it against the .app/.dmg size increase that it will cause.
The size increase relative to -O2 is 1900kB (6%) .app and 800kB (5%) .dmg.

BUG=16713
TEST=Watch perf

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=24511

[Mark Mentovai, 2009-08-26 19:58:58]

I've run all tests locally except for layout tests, which are running now.

[TVL, 2009-08-26 20:02:04]

lg

[Mark Mentovai, 2009-08-26 20:13:31]

All layout tests passed

(Except for both copies of text-fonts-01-t.svg, which never pass for me.)