tree cfdc5f36fe8a87cdaae54fb48ab35af511c25e35
parent ebf4fb6ef0c66c8af84d82223676c9f70272abcd
author John McCutchan <johnmccutchan@google.com> 1444226096 -0700
committer John McCutchan <johnmccutchan@google.com> 1444226096 -0700

Add max post-gc heap usage metrics

- Add per heap max usage metrics.
- Add combined heap (max) usage metrics.

Fixes #24483

R=koda@google.com

Review URL: https://codereview.chromium.org/1384003004 .