Notify VRDeviceProviders when there are pages listening for vrdisplayactivate

third_party/WebKit/Source/modules/vr/VRController.cpp

 // Copyright 2015 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.
 
 #include "modules/vr/VRController.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/Document.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 34 matching lines @@
     resolver->resolve(m_displays);
     return;
   }
 
   // Otherwise we're still waiting for the full list of displays to be populated
   // so queue up the promise for resolution when onDisplaysSynced is called.
   m_pendingGetDevicesCallbacks.append(
       makeUnique<VRGetDevicesCallback>(resolver));
 }
 
+void VRController::setListeningForActivate(bool listening) {
+  if (m_service)
+    m_service->SetListeningForActivate(listening);
+}
+
 // Each time a new VRDisplay is connected we'll recieve a VRDisplayPtr for it
 // here. Upon calling SetClient in the constructor we should receive one call
 // for each VRDisplay that was already connected at the time.
 void VRController::OnDisplayConnected(
     device::mojom::blink::VRDisplayPtr display,
     device::mojom::blink::VRDisplayClientRequest request,
     device::mojom::blink::VRDisplayInfoPtr displayInfo) {
   VRDisplay* vrDisplay =
       new VRDisplay(m_navigatorVR, std::move(display), std::move(request));
   vrDisplay->update(displayInfo);
@@ skipping 42 matching lines @@
 }
 
 DEFINE_TRACE(VRController) {
   visitor->trace(m_navigatorVR);
   visitor->trace(m_displays);
 
   ContextLifecycleObserver::trace(visitor);
 }
 
 }  // namespace blink