Merge bleeding_edge revisions 2971, 2972 (heap profiler updates) to trunk.

My changes in Chromium DevTools are depend on these updates.

Review URL: http://codereview.chromium.org/243045

git-svn-id: http://v8.googlecode.com/svn/trunk@2997 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
4 files changed