GitLab

- Modified comments for |-ensureAppLaunchedWithConfiguration:| method of
  |AppLaunchManager| reminding users to choose suitable place to call
  this method for better efficiency.
- Changed default value of |RelaunchPolicy| in |AppLaunchConfiguration|
  to |NoForceRelaunchAndResetState| which is more commonly used when
  user relaunches the app for different enabled features.

Bug: 1009017
Change-Id: I523304d387d5f873a33cc0b72023d9eafe6e7c20
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2073137Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Zhaoyang Li <zhaoyangli@chromium.org>
Cr-Commit-Position: refs/heads/master@{#744820}