Reviewed by Yury Semikhatsky.

        Web Inspector: migrate debugger domain to the unified breakpoint location notion.
        https://bugs.webkit.org/show_bug.cgi?id=57928

        * inspector/Inspector.json:
        * inspector/InspectorDebuggerAgent.cpp:
        (WebCore::buildObjectForBreakpointCookie):
        (WebCore::InspectorDebuggerAgent::setBreakpointByUrl):
        (WebCore::InspectorDebuggerAgent::setBreakpoint):
        (WebCore::InspectorDebuggerAgent::resolveBreakpoint):
        (WebCore::InspectorDebuggerAgent::didParseSource):
        * inspector/InspectorDebuggerAgent.h:
        * inspector/front-end/Breakpoint.js:
        (WebInspector.Breakpoint):
        * inspector/front-end/DebuggerModel.js:
        (WebInspector.DebuggerModel.prototype.setBreakpointBySourceId):
        (WebInspector.DebuggerModel.prototype._breakpointResolved):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@83164 268f45cc-cd09-0410-ab3c-d52691b4dbfc