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

chrome/browser/android/vr_shell/vr_shell_delegate.h

Index: chrome/browser/android/vr_shell/vr_shell_delegate.h
diff --git a/chrome/browser/android/vr_shell/vr_shell_delegate.h b/chrome/browser/android/vr_shell/vr_shell_delegate.h
index ba1937b649caba70e5ffd6314e0728683f9a3fec..7484f0cd2a7437ba82b13f21f9beb9e4401ee774 100644
--- a/chrome/browser/android/vr_shell/vr_shell_delegate.h
+++ b/chrome/browser/android/vr_shell/vr_shell_delegate.h
@@ -50,6 +50,10 @@ class VrShellDelegate : public device::GvrDelegateProvider {
                            jdouble interval_seconds);
   void OnPause(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
   void OnResume(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+  void UpdateNonPresentingContext(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& obj,
+      jlong context);
   void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
 
   device::GvrDeviceProvider* device_provider() { return device_provider_; }