Yup even tougher: the dumper opens a socket (and waits synchronously) to the memtrack_helper which in turn invokes a GL driver function that can take arbitrary time (depending on the driver implementation).

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d809a6a7a6dfe5bc6e46aef63a8c2c0f61328aa3

commit d809a6a7a6dfe5bc6e46aef63a8c2c0f61328aa3
Author: petrcermak <petrcermak@chromium.org>
Date: Wed May 25 14:13:01 2016

[memory-infra] Dump gpu/android_memtrack on detailed dumps only

BUG= 614387 

Review-Url: https://codereview.chromium.org/2012643003
Cr-Commit-Position: refs/heads/master@{#395887}

[modify] https://crrev.com/d809a6a7a6dfe5bc6e46aef63a8c2c0f61328aa3/components/tracing/graphics_memory_dump_provider_android.cc