Launch Chrome when phone inserted into Daydream headset IFF Chrome was the active app

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

Index: chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrDaydreamApiImpl.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrDaydreamApiImpl.java b/chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrDaydreamApiImpl.java
new file mode 100644
index 0000000000000000000000000000000000000000..69755f3f2c2b25e6743066c92383a1a4ccccc4d8
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/vr_shell/VrDaydreamApiImpl.java
@@ -0,0 +1,46 @@
+// Copyright 2016 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 android.app.PendingIntent;
+import android.content.Context;
+
+import com.google.vr.ndk.base.DaydreamApi;
+
+import org.chromium.base.annotations.UsedByReflection;
+
+/**
+ * A wrapper for DaydreamApi.
+ */
+@UsedByReflection("VrShellDelegate.java")
+public class VrDaydreamApiImpl implements VrDaydreamApi {
+    private DaydreamApi mDaydreamApi;
+
+    @UsedByReflection("VrShellDelegate.java")
+    public VrDaydreamApiImpl(Context context) {
+        mDaydreamApi = DaydreamApi.create(context);
+    }
+
+    @Override
+    public void registerDaydreamIntent(PendingIntent pendingIntent) {
+        if (mDaydreamApi != null) {
+            mDaydreamApi.registerDaydreamIntent(pendingIntent);
+        }
+    }
+    @Override
+    public void unregisterDaydreamIntent() {
+        if (mDaydreamApi != null) {
+            mDaydreamApi.unregisterDaydreamIntent();
+        }
+    }
+
+    @Override
+    public void close() {
+        if (mDaydreamApi != null) {
+            mDaydreamApi.close();
+        }
+        mDaydreamApi = null;
+    }
+}