Remove Sync GetPose VRService call, implement VRVSyncProvider

chrome/browser/android/vr_shell/vr_shell_delegate.cc

Index: chrome/browser/android/vr_shell/vr_shell_delegate.cc
diff --git a/chrome/browser/android/vr_shell/vr_shell_delegate.cc b/chrome/browser/android/vr_shell/vr_shell_delegate.cc
index 9a3dd570bc4e6ea2eb74f82c67d127d30e489ed8..f9de5819d207d6370db51c6b868d77b725fc0e1c 100644
--- a/chrome/browser/android/vr_shell/vr_shell_delegate.cc
+++ b/chrome/browser/android/vr_shell/vr_shell_delegate.cc
@@ -29,8 +29,6 @@ class GvrNonPresentingDelegate : public device::GvrDelegate {
   void SubmitWebVRFrame() override {}
   void UpdateWebVRTextureBounds(const gvr::Rectf& left_bounds,
                                 const gvr::Rectf& right_bounds) override {}
-  void SetGvrPoseForWebVr(const gvr::Mat4f& pose,
-                          uint32_t pose_index) override {}
   void SetWebVRRenderSurfaceSize(int width, int height) override {}
   gvr::Sizei GetWebVRCompositorSurfaceSize() override {
     return device::kInvalidRenderTargetSize; }