Declarative resource hints go through mojo IPC to //content

third_party/WebKit/Source/platform/network/NetworkHints.cpp

 /*
  * Copyright (C) 2008 Collin Jackson  <collinj@webkit.org>
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "platform/network/NetworkHints.h"
 
+#include "platform/PlatformMojoServices.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebPrescientNetworking.h"
 
 namespace blink {
 
-void prefetchDNS(const String& hostname)
+void speculativePrefetchDNS(const String& hostname)
 {
     if (WebPrescientNetworking* prescientNetworking = Platform::current()->prescientNetworking())
         prescientNetworking->prefetchDNS(hostname);
 }
 
+void prefetchDNS(const KURL& url)
+{
+    Platform::current()->mojoServices()->resourceHintsHandler()->Preresolve(url);
+}
+
 void preconnect(const KURL& url, const CrossOriginAttributeValue crossOrigin)
 {
-    if (WebPrescientNetworking* prescientNetworking = Platform::current()->prescientNetworking()) {
-        bool allowCredentials = (crossOrigin != CrossOriginAttributeAnonymous);
-        prescientNetworking->preconnect(url, allowCredentials);
-    }
+    bool allowCredentials = (crossOrigin != CrossOriginAttributeAnonymous);
+    Platform::current()->mojoServices()->resourceHintsHandler()->Preconnect(url, allowCredentials, 1);
 }
 
 } // namespace blink