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 org.chromium.base.annotations.JNINamespace;
+
+/**
+ * Container class to provide the version and the compatibility with Chrome of the installed VrCore.
+ */
+@JNINamespace("vr_shell")
+public class VrCoreInfo {
+    /** Represents the version of the installed GVR SDK. */
+    public static class GvrVersion {
+        public final int majorVersion;
+        public final int minorVersion;
+        public final int patchVersion;
+
+        public GvrVersion(int majorVersion, int minorVersion, int patchVersion) {
+            this.majorVersion = majorVersion;
+            this.minorVersion = minorVersion;
+            this.patchVersion = patchVersion;
+        }
+    }
+
+    public final GvrVersion gvrVersion;
+    @VrCoreCompatibility
+    public final int compatibility;
+
+    public VrCoreInfo(GvrVersion gvrVersion, int compatibility) {
+        this.gvrVersion = gvrVersion;
+        this.compatibility = compatibility;
+    }
+
+    public long makeNativeVrCoreInfo() {
+        return (gvrVersion == null) ? nativeInit(0, 0, 0, compatibility)
+                                    : nativeInit(gvrVersion.majorVersion, gvrVersion.minorVersion,
+                                              gvrVersion.patchVersion, compatibility);
+    }
+
+    private native long nativeInit(
+            int majorVersion, int minorVersion, int patchVersion, int compatibility);
+}