add heat map generate to toolchain-utils.

This add the script to generate heat maps for chrome.

BUG=chromium:546104
TEST=it can generate heat maps when profile and chroot is given.

Change-Id: Ic60349ee1024664beb0d7450db0d7282439f79ac
Reviewed-on: https://chrome-internal-review.googlesource.com/235857
Commit-Ready: Yunlian Jiang <yunlian@google.com>
Tested-by: Yunlian Jiang <yunlian@google.com>
Reviewed-by: Luis Lozano <llozano@chromium.org>
2 files changed