Declarative resource hints go through mojo IPC to //content

third_party/WebKit/Source/core/html/parser/HTMLPreloadScannerTest.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/html/parser/HTMLPreloadScanner.h"
 
 #include "core/MediaTypeNames.h"
 #include "core/css/MediaValuesCached.h"
 #include "core/fetch/ClientHintsPreferences.h"
 #include "core/frame/Settings.h"
@@ skipping 62 matching lines @@
     void preconnectRequestVerification(const String& host, CrossOriginAttributeValue crossOrigin)
     {
         if (!host.isNull()) {
             EXPECT_TRUE(m_preloadRequest->isPreconnect());
             EXPECT_STREQ(m_preloadRequest->resourceURL().ascii().data(), host.ascii().data());
             EXPECT_EQ(m_preloadRequest->crossOrigin(), crossOrigin);
         }
     }
 
 protected:
-    void preload(PassOwnPtr<PreloadRequest> preloadRequest, const NetworkHintsInterface&) override
+    void preload(PassOwnPtr<PreloadRequest> preloadRequest) override
     {
         m_preloadRequest = std::move(preloadRequest);
     }
 
 private:
     OwnPtr<PreloadRequest> m_preloadRequest;
 };
 
 class HTMLPreloadScannerTest : public testing::Test {
 protected:
@@ skipping 313 matching lines @@
         {"http://example.test", "<link rel=preload href=bla as=track>", "bla", "http://example.test/", Resource::TextTrack, 0},
         {"http://example.test", "<link rel=preload href=bla as=image media=\"(max-width: 800px)\">", "bla", "http://example.test/", Resource::Image, 0},
         {"http://example.test", "<link rel=preload href=bla as=image media=\"(max-width: 400px)\">", nullptr, "http://example.test/", Resource::Image, 0},
     };
 
     for (const auto& testCase : testCases)
         test(testCase);
 }
 
 } // namespace blink