Add support of vrdisplayconnect and vrdisplaydisconnect event

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 "core/dom/DOMException.h"
 #include "core/dom/Document.h"
 #include "core/frame/LocalFrame.h"
 #include "modules/vr/NavigatorVR.h"
@@ skipping 159 matching lines @@
     vrDisplay->update(display);
 }
 
 void VRController::OnExitPresent(unsigned index)
 {
     VRDisplay* vrDisplay = getDisplayForIndex(index);
     if (vrDisplay)
         vrDisplay->forceExitPresent();
 }
 
+void VRController::OnDisplayConnected(device::blink::VRDisplayPtr display)
+{
+    VRDisplay* vrDisplay = createOrUpdateDisplay(display);
+    if (!vrDisplay)
+        return;
+
+    m_navigatorVR->fireVREvent(VRDisplayEvent::create(
+        EventTypeNames::vrdisplayconnect, true, false, vrDisplay, "connect"));
+}
+
+void VRController::OnDisplayDisconnected(unsigned index)
+{
+    VRDisplay* vrDisplay = getDisplayForIndex(index);
+    if (!vrDisplay)
+        return;
+
+    vrDisplay->disconnected();
+
+    m_navigatorVR->fireVREvent(VRDisplayEvent::create(
+        EventTypeNames::vrdisplaydisconnect, true, false, vrDisplay, "disconnect"));
+}
+
 void VRController::contextDestroyed()
 {
     // If the document context was destroyed, shut down the client connection
     // and never call the mojo service again.
     m_binding.Close();
     m_service.reset();
 
     // The context is not automatically cleared, so do it manually.
     ContextLifecycleObserver::clearContext();
 }
 
 DEFINE_TRACE(VRController)
 {
     visitor->trace(m_navigatorVR);
     visitor->trace(m_displays);
 
     ContextLifecycleObserver::trace(visitor);
 }
 
 } // namespace blink