WIP: working copy-no-compositor path

device/vr/android/gvr/gvr_device.h

Index: device/vr/android/gvr/gvr_device.h
diff --git a/device/vr/android/gvr/gvr_device.h b/device/vr/android/gvr/gvr_device.h
index 4d57f581a64d2dab47c4978a4c6601f2379634eb..23707c41d80b0350b3e4657bd943862e1ba3c6fb 100644
--- a/device/vr/android/gvr/gvr_device.h
+++ b/device/vr/android/gvr/gvr_device.h
@@ -5,6 +5,8 @@
 #ifndef DEVICE_VR_ANDROID_GVR_DEVICE_H
 #define DEVICE_VR_ANDROID_GVR_DEVICE_H
 
+#include <list>
+
 #include "base/macros.h"
 #include "device/vr/vr_device.h"
 
@@ -17,6 +19,19 @@ namespace device {
 class GvrDeviceProvider;
 class GvrDelegate;
 
+class StatTracker final {
+ public:
+  StatTracker(unsigned int capacity);
+  ~StatTracker();
+  bool hasPrediction();
+  double getPrediction();
+  void add(double value);
+  void clear();
+ private:
+  unsigned int m_capacity;
+  std::list<double> m_items;
+};
+
 class GvrDevice : public VRDevice {
  public:
   GvrDevice(GvrDeviceProvider* provider, GvrDelegate* delegate);
@@ -31,9 +46,13 @@ class GvrDevice : public VRDevice {
   void SetSecureOrigin(bool secure_origin) override;
   void ExitPresent() override;
 
-  void SubmitFrame(mojom::VRPosePtr pose) override;
+  void SubmitFrame(int32_t surface_handle,
+                   mojom::VRPosePtr pose,
+                   const mojom::VRDisplay::SubmitFrameCallback& callback) override;
+  void OnFrameSubmitted(int32_t surface_handle, uint32_t frame_index, double elapsed);
   void UpdateLayerBounds(mojom::VRLayerBoundsPtr left_bounds,
                          mojom::VRLayerBoundsPtr right_bounds) override;
+  void GetSurfaceHandle(int32_t width, int32_t height, const mojom::VRDisplay::GetSurfaceHandleCallback& callback) override;
 
   void SetDelegate(GvrDelegate* delegate);
 
@@ -43,6 +62,12 @@ class GvrDevice : public VRDevice {
   GvrDelegate* delegate_;
   GvrDeviceProvider* gvr_provider_;
   bool secure_origin_ = false;
+
+  // Map takes ownership of callbacks.
+  std::map<uint32_t, device::mojom::VRDisplay::SubmitFrameCallback> callback_map_;
+  StatTracker last_processing_ms_{5};
+  StatTracker last_render_ms_{5};
+
   uint32_t pose_index_ = 1;
 
   DISALLOW_COPY_AND_ASSIGN(GvrDevice);