Refactor GVR controller gamepad API integration

device/vr/android/gvr/gvr_gamepad_data_provider.h

+// 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.
+
+#ifndef DEVICE_VR_ANDROID_GVR_GAMEPAD_DATA_PROVIDER_H
+#define DEVICE_VR_ANDROID_GVR_GAMEPAD_DATA_PROVIDER_H
+
+#include "third_party/gvr-android-sdk/src/libraries/headers/vr/gvr/capi/include/gvr.h"

[cjgrant, 2017/03/21 15:55:38]

Is it only gvr_types.h needed here?

[klausw, 2017/03/21 16:55:56]

Indeed, done.

+
+namespace device {
+
+// Subset of GVR controller data needed for the gamepad API. Filled in
+// by vr_shell's VrController and consumed by GvrGamepaDataFetcher.
+struct GvrGamepadData {
+  int64_t timestamp;
+  gvr_vec2f touch_pos;
+  gvr_quatf orientation;
+  gvr_vec3f accel;
+  gvr_vec3f gyro;
+  bool is_touching;
+  bool controller_button_pressed;
+  bool right_handed;
+};
+
+// This class exposes GVR controller data to the gamepad API. Data is
+// polled by VrShellGl, then posted to VrShell which implements the
+// GvrGamepadDataProvider interface.
+class GvrGamepadDataProvider {
+ public:
+  // Refresh current GVR controller data for use by gamepad API.
+  // Also lazily creates and registers the gamepad data factory
+  // with the gamepad manager as needed.
+  virtual void GamepadDataUpdate(GvrGamepadData data) = 0;
+
+  // Called by the gamepad data fetcher to retrieve the latest snapshot
+  // of controller data.
+  virtual GvrGamepadData GamepadDataGet() = 0;
+};
+
+}  // namespace device
+#endif  // DEVICE_VR_ANDROID_GVR_GAMEPAD_DATA_PROVIDER_H