GitLab

Reorder startup code to have a continuous block of code that contains
all per-window startup logic. This allows an easier move of this code
to SceneController.

Bug: none
Change-Id: I6f4aa4b8e69cb3a9a7283ac1bf1f2473e4a209f9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2039610Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: Stepan Khapugin <stkhapugin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#738992}