Revert "Deprecate self and total time getters and total sample count getter on CpuProfileNode"

This reverts commit r16116 due to WebKit compilation breakage. Will reland it once Blink r155755 is rolled into Chromium.

TBR=svenpanne@chromium.org
BUG=None

Review URL: https://codereview.chromium.org/22388003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@16117 ce2b1a6d-e550-0410-aec6-3dcde31c8c00