Change-Id: I7e833c3b06cfb3ff9eda663c2bee4981013744b0

Adding index accessor counter

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Ic353c11fa0f430537819387d17eedeec5466d9cc
Bug: 
Reviewed-on: https://chromium-review.googlesource.com/741169Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Natalie Silvanovich <natashenka@google.com>
Cr-Commit-Position: refs/heads/master@{#49061}