Replace MessageLoop::current()->task_runner() with ThreadTaskRunnerHandle::Get().

This CL makes the following replacements:

MessageLoop::current()->task_runner()
becomes
ThreadTaskRunnerHandle::Get()

MessageLoopForUIorIO::current()->task_runner()
becomes
DCHECK(MessageLoopForUIorIO::IsCurrent()); (or ASSERT_TRUE)
ThreadTaskRunnerHandle::Get()

TBR=gavinp@chromium.org
BUG=650723

Review-Url: https://codereview.chromium.org/2375663002
Cr-Commit-Position: refs/heads/master@{#422211}


CrOS-Libchrome-Original-Commit: 19e49e924e88e50546ec1a81dbc7b43ea4b172ef
5 files changed
tree: f5ed5745dd3cbb4840eb6c341d61250c46dd1d87
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/