Enable Feature Policy without experimental features or fullscreen

third_party/WebKit/Source/core/dom/Fullscreen.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 31 matching lines @@
 #include "core/html/HTMLIFrameElement.h"
 #include "core/input/EventHandler.h"
 #include "core/inspector/ConsoleMessage.h"
 #include "core/layout/LayoutBlockFlow.h"
 #include "core/layout/LayoutFullScreen.h"
 #include "core/layout/api/LayoutFullScreenItem.h"
 #include "core/page/ChromeClient.h"
 #include "core/svg/SVGSVGElement.h"
 #include "platform/ScopedOrientationChangeIndicator.h"
 #include "platform/UserGestureIndicator.h"
+#include "platform/feature_policy/FeaturePolicy.h"
 
 namespace blink {
 
 namespace {
 
 // https://html.spec.whatwg.org/multipage/embedded-content.html#allowed-to-use
 bool AllowedToUseFullscreen(const Frame* frame) {
   // To determine whether a Document object |document| is allowed to use the
   // feature indicated by attribute name |allowattribute|, run these steps:
 
   // 1. If |document| has no browsing context, then return false.
   if (!frame)
     return false;
 
-  if (!RuntimeEnabledFeatures::featurePolicyEnabled()) {
+  if (!IsSupportedInFeaturePolicy(WebFeaturePolicyFeature::kFullscreen)) {
     // 2. If |document|'s browsing context is a top-level browsing context, then
     // return true.
     if (frame->IsMainFrame())
       return true;
 
     // 3. If |document|'s browsing context has a browsing context container that
     // is an iframe element with an |allowattribute| attribute specified, and
     // whose node document is allowed to use the feature indicated by
     // |allowattribute|, then return true.
     if (frame->Owner() && frame->Owner()->AllowFullscreen())
@@ skipping 770 matching lines @@
 DEFINE_TRACE(Fullscreen) {
   visitor->Trace(pending_fullscreen_element_);
   visitor->Trace(fullscreen_element_stack_);
   visitor->Trace(current_full_screen_element_);
   visitor->Trace(event_queue_);
   Supplement<Document>::Trace(visitor);
   ContextLifecycleObserver::Trace(visitor);
 }
 
 }  // namespace blink