Declarative resource hints go through mojo IPC to //content

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

 /*
  * 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 35 matching lines @@
 #include "core/inspector/ConsoleMessage.h"
 #include "core/inspector/IdentifiersFactory.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/inspector/InspectorNetworkAgent.h"
 #include "core/inspector/InspectorTraceEvents.h"
 #include "core/loader/DocumentLoader.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/loader/LinkLoader.h"
 #include "core/loader/MixedContentChecker.h"
-#include "core/loader/NetworkHintsInterface.h"
 #include "core/loader/PingLoader.h"
 #include "core/loader/ProgressTracker.h"
 #include "core/loader/appcache/ApplicationCacheHost.h"
 #include "core/page/NetworkStateNotifier.h"
 #include "core/page/Page.h"
 #include "core/svg/graphics/SVGImageChromeClient.h"
 #include "core/timing/DOMWindowPerformance.h"
 #include "core/timing/Performance.h"
 #include "platform/Logging.h"
 #include "platform/TracedValue.h"
@@ skipping 241 matching lines @@
     LinkLoader::CanLoadResources resourceLoadingPolicy = LinkLoader::LoadResourcesAndPreconnect;
     MixedContentChecker::checkMixedPrivatePublic(frame(), response.remoteIPAddress());
     if (m_documentLoader == frame()->loader().provisionalDocumentLoader()) {
         ResourceFetcher* fetcher = nullptr;
         if (frame()->document())
             fetcher = frame()->document()->fetcher();
         m_documentLoader->clientHintsPreferences().updateFromAcceptClientHintsHeader(response.httpHeaderField(HTTPNames::Accept_CH), fetcher);
         // When response is received with a provisional docloader, the resource haven't committed yet, and we cannot load resources, only preconnect.
         resourceLoadingPolicy = LinkLoader::DoNotLoadResources;
     }
-    LinkLoader::loadLinksFromHeader(response.httpHeaderField(HTTPNames::Link), response.url(), frame()->document(), NetworkHintsInterfaceImpl(), resourceLoadingPolicy, nullptr);
+    LinkLoader::loadLinksFromHeader(response.httpHeaderField(HTTPNames::Link), response.url(), frame()->document(), resourceLoadingPolicy, nullptr);
 
     if (response.hasMajorCertificateErrors())
         MixedContentChecker::handleCertificateError(frame(), response, frameType, requestContext);
 
     frame()->loader().progress().incrementProgress(identifier, response);
     frame()->loader().client()->dispatchDidReceiveResponse(m_documentLoader, identifier, response);
     TRACE_EVENT_INSTANT1("devtools.timeline", "ResourceReceiveResponse", TRACE_EVENT_SCOPE_THREAD, "data", InspectorReceiveResponseEvent::data(identifier, frame(), response));
     DocumentLoader* documentLoader = masterDocumentLoader();
     InspectorInstrumentation::didReceiveResourceResponse(frame(), identifier, documentLoader, response, resource);
     // It is essential that inspector gets resource response BEFORE console.
@@ skipping 456 matching lines @@
 }
 
 DEFINE_TRACE(FrameFetchContext)
 {
     visitor->trace(m_document);
     visitor->trace(m_documentLoader);
     FetchContext::trace(visitor);
 }
 
 } // namespace blink