Remove memory category from chrome://tracing

The tcmalloc heap profiler will be replaced with the heap profiler
in memory-infra. This removes the old "memory" category in
chrome://tracing. (For now, the checkbox still exists in the UI.)

A few places still reference the heap profiling functionality of
tcmalloc. This is left untouched.

Related trace viewer issues:
https://github.com/catapult-project/catapult/issues/1050
https://github.com/catapult-project/catapult/issues/1804

BUG=560300, 524631
TBR=brettw

Review URL: https://codereview.chromium.org/1468883003

Cr-Commit-Position: refs/heads/master@{#361903}


CrOS-Libchrome-Original-Commit: 04511cb6300db2b3cf886bb7d147e1ae72fb8ce6
7 files changed
tree: 2ce2f3f42747bf627a8de3792ac82db7d8509e11
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/