Declarative resource hints go through mojo IPC to //content

third_party/WebKit/Source/core/loader/LinkLoaderTest.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/loader/LinkLoader.h"
 
 #include "core/fetch/MemoryCache.h"
 #include "core/fetch/ResourceFetcher.h"
 #include "core/frame/Settings.h"
 #include "core/html/LinkRelAttribute.h"
@@ skipping 43 matching lines @@
 };
 
 class NetworkHintsMock : public NetworkHintsInterface {
 public:
     NetworkHintsMock()
         : m_didDnsPrefetch(false)
         , m_didPreconnect(false)
     {
     }
 
-    void dnsPrefetchHost(const String& host) const override
+    void dnsPrefetchHost(const KURL& host) const override
     {
         m_didDnsPrefetch = true;
     }
 
     void preconnectHost(const KURL& host, const CrossOriginAttributeValue crossOrigin) const override
     {
         m_didPreconnect = true;
         m_isHTTPS = host.protocolIs("https");
         m_isCrossOrigin = (crossOrigin == CrossOriginAttributeAnonymous);
     }
@@ skipping 166 matching lines @@
             hrefURL,
             dummyPageHolder->document(),
             networkHints);
         ASSERT_EQ(testCase.shouldLoad, networkHints.didPreconnect());
         ASSERT_EQ(testCase.isHTTPS, networkHints.isHTTPS());
         ASSERT_EQ(testCase.isCrossOrigin, networkHints.isCrossOrigin());
     }
 }
 
 } // namespace blink