Remove UserGestureUtilizedCallback, it's unused outside of tests

third_party/WebKit/Source/modules/vr/VRDisplay.cpp

Index: third_party/WebKit/Source/modules/vr/VRDisplay.cpp
diff --git a/third_party/WebKit/Source/modules/vr/VRDisplay.cpp b/third_party/WebKit/Source/modules/vr/VRDisplay.cpp
index 553622a0dfa064f16522cfd8694dc7834f1abb48..5a506e755562c7ab3ef7e38bb8d59b3d7e715f2d 100644
--- a/third_party/WebKit/Source/modules/vr/VRDisplay.cpp
+++ b/third_party/WebKit/Source/modules/vr/VRDisplay.cpp
@@ -206,7 +206,7 @@ ScriptPromise VRDisplay::requestPresent(ScriptState* script_state,
   // If the VRDisplay is already presenting, however, repeated calls are
   // allowed outside a user gesture so that the presented content may be
   // updated.
-  if (first_present && !UserGestureIndicator::UtilizeUserGesture() &&
+  if (first_present && !UserGestureIndicator::ProcessingUserGesture() &&
       !in_display_activate_) {
     DOMException* exception = DOMException::Create(
         kInvalidStateError, "API can only be initiated by a user gesture.");