always lookup api holder from receiver

R=verwaest@chromium.org

BUG=

Review URL: https://codereview.chromium.org/219723002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20392 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Remove debugger_auto_break flag

The flag was introduced to support console debugger in Chrome. That debugger was replaced by DevTools long time ago and the flag is always true now.

BUG=None
LOG=Y
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/220743003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20393 ce2b1a6d-e550-0410-aec6-3dcde31c8c00