Implement WebVR presentation pausing for VR Shell Menu Mode

device/vr/test/fake_vr_device_provider.h

Index: device/vr/test/fake_vr_device_provider.h
diff --git a/device/vr/test/fake_vr_device_provider.h b/device/vr/test/fake_vr_device_provider.h
index 29323f3e361a0f8cdb7984a9adda7c1517687938..66ff20db2fef2effcc5b310cb0fbc54b207d3664 100644
--- a/device/vr/test/fake_vr_device_provider.h
+++ b/device/vr/test/fake_vr_device_provider.h
@@ -14,7 +14,6 @@ namespace device {
 class FakeVRDeviceProvider : public VRDeviceProvider {
  public:
   FakeVRDeviceProvider();
-  ~FakeVRDeviceProvider() override;
 
   // Adds devices to the provider with the given device, which will be
   // returned when GetDevices is queried.
@@ -26,6 +25,8 @@ class FakeVRDeviceProvider : public VRDeviceProvider {
   void Initialize() override;
 
  private:
+  ~FakeVRDeviceProvider() override;
+
   std::vector<VRDevice*> devices_;
   bool initialized_;
 };