Add automated VR controller emulator

chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/EmulatedVrController.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/EmulatedVrController.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/EmulatedVrController.java b/chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/EmulatedVrController.java
new file mode 100644
index 0000000000000000000000000000000000000000..304169a7a521e795ce2f30f2a54fe82cbb51ed07
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+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/vr_shell/EmulatedVrController.java
@@ -0,0 +1,40 @@
+// 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 android.content.Context;
+
+import com.google.vr.testframework.controller.ControllerTestApi;
+
+/**
+ * Wrapper for the ControllerTestApi class to handle more complex actions such
+ * as clicking and dragging.
+ *
+ * Requires that VrCore's settings file is modified to use the test API:
+ *   - UseAutomatedController: true
+ *   - PairedControllerDriver: "DRIVER_AUTOMATED"
+ *   - PairedControllerAddress: "FOO"
+ */
+public class EmulatedVrController {
+    private final ControllerTestApi mApi;
+
+    public EmulatedVrController(Context context) {
+        mApi = new ControllerTestApi(context);
+    }
+
+    public ControllerTestApi getApi() {
+        return mApi;
+    }
+
+    /**
+     * Presses and quickly releases the Daydream controller's touchpad button.
+     * Or, if the button is already pressed, releases and quickly presses again.
+     */
+    public void pressReleaseTouchpadButton() {
+        mApi.buttonEvent.sendClickButtonEvent();
+    }
+
+    // TODO(bsheedy): Add support for more complex actions, e.g. click/drag/release
+}