Tracks GVR version crossed with headset type using UMA.

chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrCoreInfo.java

+// Copyright 2017 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.
+
+package org.chromium.chrome.browser.vr_shell;
+
+import com.google.vr.ndk.base.Version;
+
+/**
+ * Container class to provide the version and the compatibility with Chromium of the installed
+ * VrCore.
+ */
+public class VrCoreInfo {
+    public final Version version;
+    public final int compatibility;
+
+    public VrCoreInfo(Version version, int compatibility) {

[mthiesse, 2017/05/16 01:15:12]

If you want to share the compatibility enum across java and c++, see
https://codesearch.chromium.org/chromium/src/content/public/android/BUILD.gn?...

browser_controls_state.h is an example of what you want to do.

[tiborg, 2017/05/23 15:47:24]

Oh yes. Very good advice. Pretty neat.

+        this.version = version;
+        this.compatibility = compatibility;
+    }
+}