[webkit-changes] [WebKit/WebKit] cebf8b: [WebXR] ARKitCoordinator enter/exit state management

[Dan Glastonbury]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: cebf8bf46cd6279bb3b6a1bcb1cd4483c95131a1
      https://github.com/WebKit/WebKit/commit/cebf8bf46cd6279bb3b6a1bcb1cd4483c95131a1
  Author: Dan Glastonbury <djg at apple.com>
  Date:   2023-10-11 (Wed, 11 Oct 2023)

  Changed paths:
    M Source/WebKit/UIProcess/XR/ios/PlatformXRARKit.h
    M Source/WebKit/UIProcess/XR/ios/PlatformXRARKit.mm

  Log Message:
  -----------
  [WebXR] ARKitCoordinator enter/exit state management
https://bugs.webkit.org/show_bug.cgi?id=262760
rdar://116502232

Unreviewed relanding rolled-out dependency.

Implement basic state management for ARKitCoordinator to provide enough support
for immersive-ar-session.html to support starting and exiting an immersive AR
session and handle messages from the page.

* Source/WebKit/UIProcess/XR/ios/PlatformXRARKit.h:
* Source/WebKit/UIProcess/XR/ios/PlatformXRARKit.mm:
(WebKit::ARKitCoordinator::startSession):
(WebKit::ARKitCoordinator::endSessionIfExists):
(WebKit::ARKitCoordinator::scheduleAnimationFrame):
(WebKit::ARKitCoordinator::submitFrame):
(WebKit::ARKitCoordinator::currentSessionHasEnded):
(WebKit::ARKitCoordinator::didCompleteSessionSetup):

Canonical link: https://commits.webkit.org/269239@main