Tracks GVR version crossed with headset type using UMA.

chrome/browser/android/vr_shell/vr_shell_delegate.h

Index: chrome/browser/android/vr_shell/vr_shell_delegate.h
diff --git a/chrome/browser/android/vr_shell/vr_shell_delegate.h b/chrome/browser/android/vr_shell/vr_shell_delegate.h
index ba1937b649caba70e5ffd6314e0728683f9a3fec..a68e337328eab9972f79daae1c4f61865f55ec93 100644
--- a/chrome/browser/android/vr_shell/vr_shell_delegate.h
+++ b/chrome/browser/android/vr_shell/vr_shell_delegate.h
@@ -12,6 +12,7 @@
 #include "base/android/jni_weak_ref.h"
 #include "base/callback.h"
 #include "base/macros.h"
+#include "chrome/browser/android/vr_shell/vr_usage_monitor.h"
 #include "device/vr/android/gvr/gvr_delegate_provider.h"
 #include "third_party/gvr-android-sdk/src/libraries/headers/vr/gvr/capi/include/gvr_types.h"
 
@@ -65,10 +66,9 @@ class VrShellDelegate : public device::GvrDelegateProvider {
                            const base::Callback<void(bool)>& callback) override;
   device::GvrDelegate* GetDelegate() override;
   void SetListeningForActivate(bool listening) override;
-
   void CreateNonPresentingDelegate();
-
   void OnActivateDisplayHandled(bool present_requested);
+  std::pair<GvrVersionStatus, gvr_version> GetGvrVersion(JNIEnv* env);
 
   std::unique_ptr<NonPresentingGvrDelegate> non_presenting_delegate_;
   base::android::ScopedJavaGlobalRef<jobject> j_vr_shell_delegate_;