Prevents exiting presentation if triggering DON while presenting.

third_party/WebKit/Source/modules/vr/VRDisplay.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef VRDisplay_h
 #define VRDisplay_h
 
 #include "core/dom/Document.h"
 #include "core/dom/FrameRequestCallback.h"
 #include "core/events/EventTarget.h"
@@ skipping 173 matching lines @@
   Member<ScriptedAnimationController> scripted_animation_controller_;
   bool pending_vrdisplay_raf_ = false;
   bool pending_vsync_ = false;
   bool in_animation_frame_ = false;
   bool in_display_activate_ = false;
   bool display_blurred_ = false;
   double timebase_ = -1;
   bool pending_previous_frame_render_ = false;
   bool pending_submit_frame_ = false;
   bool v_sync_connection_failed_ = false;
-  bool pending_present_request_ = false;
+  bool requested_present_in_display_activate_ = false;
 
   device::mojom::blink::VRDisplayPtr display_;
 
   mojo::Binding<device::mojom::blink::VRSubmitFrameClient>
       submit_frame_client_binding_;
   mojo::Binding<device::mojom::blink::VRDisplayClient> display_client_binding_;
   device::mojom::blink::VRVSyncProviderPtr vr_v_sync_provider_;
 
   HeapDeque<Member<ScriptPromiseResolver>> pending_present_resolvers_;
 };
@@ skipping 16 matching lines @@
   kRequestDenied = 12,
   kFullscreenNotEnabled = 13,
   kPresentationResultMax,  // Must be last member of enum.
 };
 
 void ReportPresentationResult(PresentationResult);
 
 }  // namespace blink
 
 #endif  // VRDisplay_h