Apply meta tag referrer policy for preloaded requests

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 "config.h"
 #include "core/html/parser/HTMLPreloadScanner.h"
 
 #include "core/MediaTypeNames.h"
 #include "core/css/MediaValuesCached.h"
 #include "core/fetch/ClientHintsPreferences.h"
@@ skipping 44 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->isCORS(), crossOrigin != CrossOriginAttributeNotSet);
             EXPECT_EQ(m_preloadRequest->isAllowCredentials(), crossOrigin == CrossOriginAttributeUseCredentials);
         }
     }
 
+    void preloadReferrerPolicy(const String& policy) override
+    {
+        return;
+    }
+
 protected:
     void preload(PassOwnPtr<PreloadRequest> preloadRequest) override
     {
         m_preloadRequest = preloadRequest;
     }
 
 private:
     OwnPtr<PreloadRequest> m_preloadRequest;
 };
 
@@ skipping 216 matching lines @@
         {"http://example.test", "<picture><source sizes='50vw' srcset='srcset_bla.gif'><img sizes='50w' src='bla.gif'></picture>", "srcset_bla.gif", "http://example.test/", Resource::Image, 250},
         {"http://example.test", "<picture><source srcset='srcset_bla.gif' sizes='50vw'><img sizes='50w' src='bla.gif'></picture>", "srcset_bla.gif", "http://example.test/", Resource::Image, 250},
         {"http://example.test", "<picture><source srcset='srcset_bla.gif'><img sizes='50w' src='bla.gif'></picture>", "srcset_bla.gif", "http://example.test/", Resource::Image, 0},
     };
 
     for (const auto& testCase : testCases)
         test(testCase);
 }
 
 } // namespace blink