When gn's desc command is used with --tree, it prints a dependency tree. But recursively printing the dependency tree of a high-level target in Chrome prints too much output to be useful because it's printing, e.g. base and it's deps over and over (//chrome/browser-s --tree is 3210166 lines).
With this patch, a target will be recursed into the first time it's printed, but subsequent times the children will be elided with "..." This brings down //chrome/browser to 2050 lines. The previous behavior is still available (it could be useful in certain cases) via "--tree --all".
This also updates an optimization comment in the the optimization setup (optimize_max isn't just Windows-only).
R=dalecurtis@chromium.org
Review URL: https://codereview.chromium.org/437033002
git-svn-id: http://src.chromium.org/svn/trunk/src/build@287424 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
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