fix and update debug-debugger.js

added `switch` statement is missing `break`s

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/494303004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23441 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Wire up simplified and change lowering in pipeline.

R=titzer@chromium.org

Review URL: https://codereview.chromium.org/511713003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23442 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix chromium sync command in auto-roller.

TBR=hinoka@chromium.org, jarin@chromium.org

Review URL: https://codereview.chromium.org/506273007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23443 ce2b1a6d-e550-0410-aec6-3dcde31c8c00