Refactor VR math off of GVR types, onto gfx types where possible.

chrome/browser/android/vr_shell/non_presenting_gvr_delegate.h

Index: chrome/browser/android/vr_shell/non_presenting_gvr_delegate.h
diff --git a/chrome/browser/android/vr_shell/non_presenting_gvr_delegate.h b/chrome/browser/android/vr_shell/non_presenting_gvr_delegate.h
index c384edfafcaf8c98898356e6db56c4d670dda471..d921ea4fd9f782bb0b407c046b2ee81f3dd3233c 100644
--- a/chrome/browser/android/vr_shell/non_presenting_gvr_delegate.h
+++ b/chrome/browser/android/vr_shell/non_presenting_gvr_delegate.h
@@ -31,9 +31,9 @@ class NonPresentingGvrDelegate : public device::GvrDelegate,
   void SubmitWebVRFrame(int16_t frame_index,
                         const gpu::MailboxHolder& mailbox) override {}
   void UpdateWebVRTextureBounds(int16_t frame_index,
-                                const gvr::Rectf& left_bounds,
-                                const gvr::Rectf& right_bounds,
-                                const gvr::Sizei& source_size) override {}
+                                const gfx::RectF& left_bounds,
+                                const gfx::RectF& right_bounds,
+                                const gfx::Size& source_size) override {}
   void OnVRVsyncProviderRequest(
       device::mojom::VRVSyncProviderRequest request) override;
   void UpdateVSyncInterval(int64_t timebase_nanos,