DevTools: [FlameChart] change cursor style when it hovers a bar with js function.
DevTools: [FlameChart] change cursor style when it hovers a bar with js function.

We can jump to the source when node has scriptId.

BUG=none
R=yurys@chromium.org

Review URL: https://codereview.chromium.org/18642002

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@153501 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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