Implement WebVR presentation pausing for VR Shell Menu Mode

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

Index: third_party/WebKit/Source/modules/vr/NavigatorVR.cpp
diff --git a/third_party/WebKit/Source/modules/vr/NavigatorVR.cpp b/third_party/WebKit/Source/modules/vr/NavigatorVR.cpp
index 9ef4489c674985325f37a19d9de3a3ccbf984b27..b6d8ccbbbb27cfe128ab0e730dba519dddc20993 100644
--- a/third_party/WebKit/Source/modules/vr/NavigatorVR.cpp
+++ b/third_party/WebKit/Source/modules/vr/NavigatorVR.cpp
@@ -104,6 +104,16 @@ void NavigatorVR::fireVRDisplayPresentChange(VRDisplay* display) {
   }
 }
 
+void NavigatorVR::fireVrDisplayOnBlur(VRDisplay* display) {
+  fireVREvent(VRDisplayEvent::create(EventTypeNames::vrdisplayblur, true, false,
+                                     display, ""));
+}
+
+void NavigatorVR::fireVrDisplayOnFocus(VRDisplay* display) {
+  fireVREvent(VRDisplayEvent::create(EventTypeNames::vrdisplayfocus, true,
+                                     false, display, ""));
+}
+
 void NavigatorVR::fireVREvent(VRDisplayEvent* event) {
   if (frame() && frame()->localDOMWindow()) {
     frame()->localDOMWindow()->enqueueWindowEvent(event);