[JSC] Fix sign comparison warning/error after r144340.
https://bugs.webkit.org/show_bug.cgi?id=111164

Reviewed by Mark Hahnenberg.

gcc (both 4.2.1 and 4.7.2) complain about comparing signed and
unsigned terms (clang accepts it just fine).

Work around that by casting the 1 to an uintptr_t as well.

* dfg/DFGEdge.h:
(JSC::DFG::Edge::makeWord):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144452 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Web Inspector: [Timeline] Show "curtains" when mouse is over CPU bar.
https://bugs.webkit.org/show_bug.cgi?id=108930

Reviewed by Pavel Feldman.

This feature will help developers to focus on events
that caused CPU bar.

* inspector/front-end/Popover.js: Added "arrowDirection" parameter.
* inspector/front-end/TimelineGrid.js:
(WebInspector.TimelineGrid): Added "curtains".
* inspector/front-end/TimelinePanel.js:
(WebInspector.TimelinePanel.prototype._mouseMove): Show/hide "curtains"
when mouse is over CPU bar.
* inspector/front-end/timelinePanel.css: Added "curtains" style rules.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144453 268f45cc-cd09-0410-ab3c-d52691b4dbfc