The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/aba30978d6c58a937eb2cf5fbdcde3e2abb7cfaa

commit aba30978d6c58a937eb2cf5fbdcde3e2abb7cfaa
Author: dimaa <dimaa@chromium.org>
Date: Mon Mar 06 19:57:12 2017

Clean up g_memory_coordinator after each MemoryCoordinatorImpl test

MemoryCoordinatorImpl tests fail the first time and should be re-run separately.
g_memory_coordinator need to be cleaned up between tests, otherwise the subsequent tests
will crash trying to reset g_memory_coordinator.

This CL implements reset method which called after each MemoryCoordinatorImpl in destructor.

BUG=698282

Review-Url: https://codereview.chromium.org/2726983006
Cr-Commit-Position: refs/heads/master@{#454926}

[modify] https://crrev.com/aba30978d6c58a937eb2cf5fbdcde3e2abb7cfaa/base/memory/memory_coordinator_proxy.cc
[modify] https://crrev.com/aba30978d6c58a937eb2cf5fbdcde3e2abb7cfaa/content/browser/memory/memory_coordinator_impl.cc