Improve -m to be more efficient, only lookup the current rev if it is pinned. Use svn up --force if -m or -f is used. Renamed AddAdditionalFlags to _AddAdditionalUpdateFlags to be clearer about its purpose. Strings cleanup.
Improve -m to be more efficient, only lookup the current rev if it is pinned.
Use svn up --force if -m or -f is used.
Renamed AddAdditionalFlags to _AddAdditionalUpdateFlags to be clearer about its purpose.
Strings cleanup.

With this change, it becomes more manageable to use -m on the continuous build.

Review URL: http://codereview.chromium.org/3185006

git-svn-id: bd64dd6fa6f3f0ed0c0666d1018379882b742947@56394 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

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