GitLab

Merge NavigatorPresentation and Presentation, so that Presentation
is the Supplement<Navigator>

Simplify eager initialization from ModulesInitializer. Currently,
ModulesInitializer calls PresentationReceiver::From(), which calls
NavigationPresenation::presentation() to initialize the
NavigatorPresentation, Presention, and PresentationReceiver. It then
reads the PresentationReceiver off the Presentation and returns it,
even though the return value is unused. After this CL,
ModulesInitializer calls Presention::presentation(), which
initializes both Presention and PresentationReceiver, and still
ignores the return result.

This also makes Presention explicitly aware of the conditional
initialization of PresentationReceiver based on Settings.

Change-Id: I4ee01f0b501eb1cb8a2c49de0ed62cfab75bd895
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2518761Reviewed-by: mark a. foltz <mfoltz@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Commit-Queue: Nate Chapin <japhet@chromium.org>
Cr-Commit-Position: refs/heads/master@{#825505}