Make Foreign Fetch an origin trial.

third_party/WebKit/Source/core/html/HTMLLinkElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Rob Buis (rwlbuis@gmail.com)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 32 matching lines @@
 #include "core/frame/SubresourceIntegrity.h"
 #include "core/frame/UseCounter.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/html/CrossOriginAttribute.h"
 #include "core/html/LinkManifest.h"
 #include "core/html/imports/LinkImport.h"
 #include "core/inspector/ConsoleMessage.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/loader/NetworkHintsInterface.h"
+#include "core/origin_trials/OriginTrials.h"
 #include "core/style/StyleInheritedData.h"
 #include "platform/ContentType.h"
 #include "platform/Histogram.h"
 #include "platform/MIMETypeRegistry.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "public/platform/WebIconSizesParser.h"
 #include "public/platform/WebSize.h"
 #include "wtf/StdLibExtras.h"
 
 namespace blink {
@@ skipping 83 matching lines @@
     if (!shouldLoadLink()) {
         ASSERT(!linkStyle() || !linkStyle()->hasSheet());
         return nullptr;
     }
 
     if (!m_link) {
         if (m_relAttribute.isImport()) {
             m_link = LinkImport::create(this);
         } else if (m_relAttribute.isManifest()) {
             m_link = LinkManifest::create(this);
-        } else if (RuntimeEnabledFeatures::linkServiceWorkerEnabled() && m_relAttribute.isServiceWorker()) {
+        } else if (m_relAttribute.isServiceWorker() && OriginTrials::linkServiceWorkerEnabled(getExecutionContext())) {
             if (document().frame())
                 m_link = document().frame()->loader().client()->createServiceWorkerLinkResource(this);
         } else {
             LinkStyle* link = LinkStyle::create(this);
             if (fastHasAttribute(disabledAttr)) {
                 UseCounter::count(document(), UseCounter::HTMLLinkElementDisabled);
                 link->setDisabledState(true);
             }
             m_link = link;
         }
@@ skipping 556 matching lines @@
 }
 
 DEFINE_TRACE(LinkStyle)
 {
     visitor->trace(m_sheet);
     LinkResource::trace(visitor);
     ResourceOwner<StyleSheetResource>::trace(visitor);
 }
 
 } // namespace blink