Update reference builds to r89207.

Also, this change adds:

1-  A REVISION file in reference_builds/, so it'll be clear what SVN revision the
    builds were taken from.

2-  I moved chrome_mac/notes.txt out to a top-level README file with details
    about all platforms.

3-  chrome/ is renamed chrome_win/ to be consistent with other platforms.

4-  chrome_mac/Google Chrome.app is deleted since we will no longer need it once
    something like http://codereview.chromium.org/7171005/ happens.

Review URL: http://codereview.chromium.org/7192017

git-svn-id: http://src.chromium.org/svn/trunk/deps/reference_builds/chrome_win@89574 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
86 files changed