Force the script debug server to continue when disabling the debugger.

There might be some cases where the debugger will stay in the nested run loop
which cause weird issues.

Speculative fix for: https://webkit.org/b/111438

Reviewed by Joseph Pecoraro.

* inspector/InspectorDebuggerAgent.cpp:
(WebCore::InspectorDebuggerAgent::disable):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150320 268f45cc-cd09-0410-ab3c-d52691b4dbfc