Finally implement the code to automatically switch checkout when there is no local modification. Bail off as soon as there is anything showing up on svn status.
Finally implement the code to automatically switch checkout when there is no local modification.
Bail off as soon as there is anything showing up on svn status.

TBR=sgk
Review URL: http://codereview.chromium.org/113319

git-svn-id: bd64dd6fa6f3f0ed0c0666d1018379882b742947@15929 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

svn2github/chromium-depot-tools,svn2github/chromium-depot-tools,svn2github/chromium-depot-tools