Allow List::sort, with an integer comparison function, to sort 64-bit pointers in profile-generator.  Change a static const int member to be declared and defined only inside the class declaration in class Runtime.
Review URL: http://codereview.chromium.org/3424002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5453 ce2b1a6d-e550-0410-aec6-3dcde31c8c00