Add switch to disable WebVR gesture requirement

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 a266f43d9b194bc884955d27c1c2187d10041e79..befadaa2f81e49ede2cf0e99227720701fd85fda 100644
--- a/third_party/WebKit/Source/modules/vr/VRDisplay.cpp
+++ b/third_party/WebKit/Source/modules/vr/VRDisplay.cpp
@@ -23,6 +23,7 @@
 #include "modules/vr/VRStageParameters.h"
 #include "modules/webgl/WebGLRenderingContextBase.h"
 #include "platform/Histogram.h"
+#include "platform/RuntimeEnabledFeatures.h"
 #include "platform/UserGestureIndicator.h"
 #include "public/platform/Platform.h"
 #include "wtf/AutoReset.h"
@@ -274,12 +275,15 @@ ScriptPromise VRDisplay::requestPresent(ScriptState* scriptState,
   }
 
   bool firstPresent = !m_isPresenting;
+  bool gestureRequired =
+      RuntimeEnabledFeatures::webVrRequiresUserGestureEnabled();
 
   // Initiating VR presentation is only allowed in response to a user gesture.
   // If the VRDisplay is already presenting, however, repeated calls are
   // allowed outside a user gesture so that the presented content may be
   // updated.
-  if (firstPresent && !UserGestureIndicator::utilizeUserGesture()) {
+  if (firstPresent && !UserGestureIndicator::utilizeUserGesture() &&
+      gestureRequired) {
     DOMException* exception = DOMException::create(
         InvalidStateError, "API can only be initiated by a user gesture.");
     resolver->reject(exception);