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

chrome/browser/android/vr_shell/non_presenting_gvr_delegate.cc

Index: chrome/browser/android/vr_shell/non_presenting_gvr_delegate.cc
diff --git a/chrome/browser/android/vr_shell/non_presenting_gvr_delegate.cc b/chrome/browser/android/vr_shell/non_presenting_gvr_delegate.cc
index 8bf5f6e4524f00703b9feef521d7a6c77f303c6d..d3ac006a67ee5887c3265db5793bb06b3791ec85 100644
--- a/chrome/browser/android/vr_shell/non_presenting_gvr_delegate.cc
+++ b/chrome/browser/android/vr_shell/non_presenting_gvr_delegate.cc
@@ -161,4 +161,8 @@ void NonPresentingGvrDelegate::CreateVRDisplayInfo(
       GvrDelegate::CreateVRDisplayInfo(gvr_api_.get(), webvr_size, device_id));
 }
 
+void NonPresentingGvrDelegate::UpdateContext(gvr_context* context) {
+  gvr_api_ = gvr::GvrApi::WrapNonOwned(context);
+}
+
 }  // namespace vr_shell