Remove ENABLE_VR_SHELL compile-time define.

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 107be75c39a280b80a641def4f72eef758b07ea1..0bf91043cc56fa11d6e7f6a99fb736c39cc07d81 100644
--- a/chrome/browser/android/vr_shell/non_presenting_gvr_delegate.h
+++ b/chrome/browser/android/vr_shell/non_presenting_gvr_delegate.h
@@ -7,6 +7,8 @@
 
 #include <jni.h>
 
+#include <memory>
+
 #include "base/cancelable_callback.h"
 #include "base/macros.h"
 #include "device/vr/android/gvr/gvr_delegate.h"
@@ -32,7 +34,7 @@ class NonPresentingGvrDelegate : public device::GvrDelegate,
                                 const gvr::Rectf& right_bounds) override {}
   void OnVRVsyncProviderRequest(
       device::mojom::VRVSyncProviderRequest request) override;
-  void UpdateVSyncInterval(long timebase_nanos,
+  void UpdateVSyncInterval(int64_t timebase_nanos,
                            double interval_seconds) override;
   bool SupportsPresentation() override;
   void ResetPose() override;