Stay in VR while showing DOFF flow and connect CCT exit button to this.

chrome/browser/android/vr_shell/vr_gl_thread.cc

Index: chrome/browser/android/vr_shell/vr_gl_thread.cc
diff --git a/chrome/browser/android/vr_shell/vr_gl_thread.cc b/chrome/browser/android/vr_shell/vr_gl_thread.cc
index 80bbc9a1137b106e285b0a25939471b8794d85f6..a1309f5a4d5e63b565f5814f90781dc6b0babfcc 100644
--- a/chrome/browser/android/vr_shell/vr_gl_thread.cc
+++ b/chrome/browser/android/vr_shell/vr_gl_thread.cc
@@ -114,6 +114,11 @@ void VrGLThread::NavigateBack() {
       FROM_HERE, base::Bind(&VrShell::NavigateBack, weak_vr_shell_));
 }
 
+void VrGLThread::ExitCct() {
+  main_thread_task_runner_->PostTask(
+      FROM_HERE, base::Bind(&VrShell::ExitCct, weak_vr_shell_));
+}
+
 void VrGLThread::SetFullscreen(bool enabled) {
   WaitUntilThreadStarted();
   task_runner()->PostTask(FROM_HERE, base::Bind(&UiSceneManager::SetFullscreen,