commit 6cee14fee88d147b602517080780d254ea738ecc
author liberato@chromium.org <liberato@chromium.org> Tue May 07 06:09:28 2019
committer Commit Bot <commit-bot@chromium.org> Tue May 07 06:09:28 2019
tree 6699a5a597d13b115a5f692a600d0b7d7e2e6771
parent b70398b8d6c77a6aaae19a6b3e04708d9570a6c6

Add MediaExperimentManager::ScopedPlayerState.

To allow clients to change the player state, this CL adds
MediaExperimentManager::ScopedPlayerState.  This class provides
access to MediaExperimentManager::PlayerState via the -> operator,
and notifies the manager when it goes out of scope.

This is mostly a convenience to remove the need for accessor
methods on the manager.  However, it also lets the client modify
multiple properties of a player atomically, before the manager
tries to check for changes to trigger experiment notifications.

Change-Id: Icc80f17598aeccfd3d660df869281fabfc7545cd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1595115
Reviewed-by: Thomas Guilbert <tguilbert@chromium.org>
Commit-Queue: Frank Liberato <liberato@chromium.org>
Cr-Commit-Position: refs/heads/master@{#657137}