Reviewed by Yury Semikhatsky.

        Web Inspector: [Chromium] Use bottom-up CPU profile tree built in VM,
        instead of building it on Inspector's side.
        https://bugs.webkit.org/show_bug.cgi?id=61185

        * bindings/js/ScriptProfile.cpp:
        (WebCore::ScriptProfile::bottomUpHead):
        (WebCore::ScriptProfile::buildInspectorObjectForBottomUpHead):
        * bindings/js/ScriptProfile.h:
        * bindings/v8/ScriptProfile.cpp:
        (WebCore::ScriptProfile::bottomUpHead):
        (WebCore::ScriptProfile::buildInspectorObjectForBottomUpHead):
        * bindings/v8/ScriptProfile.h:
        * inspector/InspectorProfilerAgent.cpp:
        (WebCore::InspectorProfilerAgent::getProfile):
        * inspector/front-end/ProfileView.js:
        (WebInspector.CPUProfileView.prototype.get bottomUpProfileDataGridTree):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@86947 268f45cc-cd09-0410-ab3c-d52691b4dbfc