GitLab

This CL fixes an issue where the scoped_ref base::ObserverListThreadSafe
isn't initialized, causing chrome to crash immediately following
CameraHalDispatcherImpl::AddActiveClientObserver().
It also adds a unittest to make sure the observer works.

Bug: 1155159
Test: Create an observer in camera_hal_delegate.cc and verify that the
observer is registered and receives updates. \
  (DUT) $ capture_unittests --gtest_filter='*Dispatcher*'

Change-Id: I54a8a77a2b48eb328ca2c1f0a2fb3ce057f66b31
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2575297Reviewed-by: Wei Lee <wtlee@chromium.org>
Commit-Queue: Wei Lee <wtlee@chromium.org>
Auto-Submit: Jasmine Chen <lnishan@google.com>
Cr-Commit-Position: refs/heads/master@{#834553}