Remove Sync GetPose VRService call, implement VRVSyncProvider

chrome/browser/android/vr_shell/non_presenting_gvr_delegate.h

+// 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.
+
+#ifndef CHROME_BROWSER_ANDROID_VR_SHELL_NON_PRESENTING_GVR_DELEGATE_H_
+#define CHROME_BROWSER_ANDROID_VR_SHELL_NON_PRESENTING_GVR_DELEGATE_H_
+
+#include <jni.h>
+
+#include "base/cancelable_callback.h"
+#include "base/macros.h"
+#include "device/vr/android/gvr/gvr_delegate.h"
+#include "device/vr/vr_service.mojom.h"
+#include "mojo/public/cpp/bindings/binding.h"
+
+namespace vr_shell {
+
+// A non presenting delegate for magic window mode.
+class NonPresentingGvrDelegate : public device::GvrDelegate,
+                                 public device::mojom::VRVSyncProvider {
+ public:
+  explicit NonPresentingGvrDelegate(long context);
+
+  ~NonPresentingGvrDelegate() override;
+
+  // GvrDelegate implementation
+  void SetWebVRSecureOrigin(bool secure_origin) override {}
+  void SubmitWebVRFrame() override {}
+  void UpdateWebVRTextureBounds(const gvr::Rectf& left_bounds,
+                                const gvr::Rectf& right_bounds) override {}
+  void SetWebVRRenderSurfaceSize(int width, int height) override {}
+  gvr::Sizei GetWebVRCompositorSurfaceSize() override;
+  gvr::GvrApi* gvr_api() override;
+  void OnVRVsyncProviderRequest(
+      device::mojom::VRVSyncProviderRequest request) override;
+  void UpdateVSyncInterval(long timebase_nanos,
+                           double interval_seconds) override;
+
+  void Pause();
+  void Resume();
+  device::mojom::VRVSyncProviderRequest OnSwitchToPresentingDelegate();
+
+ private:
+  void StopVSyncLoop();
+  void StartVSyncLoop();
+  void OnVSync();
+  device::mojom::VRPosePtr GetPose();
+
+  // VRVSyncProvider
+  void GetVSync(const GetVSyncCallback& callback) override;
+
+  std::unique_ptr<gvr::GvrApi> gvr_api_;
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+  base::CancelableClosure vsync_task_;
+  base::TimeTicks vsync_timebase_;
+  base::TimeDelta vsync_interval_;
+
+  // Whether the vsync loop is paused, but not stopped.
+  bool vsync_paused_ = false;
+  base::TimeDelta pending_time_;
+  bool pending_vsync_ = false;
+  GetVSyncCallback callback_;
+  uint32_t pose_index_ = 1;
+  mojo::Binding<device::mojom::VRVSyncProvider> binding_;
+  base::WeakPtrFactory<NonPresentingGvrDelegate> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(NonPresentingGvrDelegate);
+};
+
+}  // namespace vr_shell
+
+#endif  // CHROME_BROWSER_ANDROID_VR_SHELL_NON_PRESENTING_GVR_DELEGATE_H_