Make ClientHintsPreferences class work like a class.

Source/core/fetch/ClientHintsPreferencesTest.cpp

 // Copyright 2014 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/fetch/ClientHintsPreferences.h"
 
 #include <gtest/gtest.h>
 
 namespace blink {
@@ skipping 14 matching lines @@
         {"WIDTH, DPR, VIWEPROT-Width", true, true, false},
         {"VIewporT-Width, wutwut, width", true, false, true},
         {"dprw", false, false, false},
         {"DPRW", false, false, false},
     };
 
     for (const auto& testCase : cases) {
         ClientHintsPreferences preferences;
         const char* value = testCase.headerValue;
 
-        handleAcceptClientHintsHeader(value, preferences, nullptr);
+        preferences.updateFromAcceptClientHintsHeader(value, nullptr);
         EXPECT_EQ(testCase.expectationResourceWidth, preferences.shouldSendResourceWidth());
         EXPECT_EQ(testCase.expectationDPR, preferences.shouldSendDPR());
         EXPECT_EQ(testCase.expectationViewportWidth, preferences.shouldSendViewportWidth());
     }
 }
 
 } // namespace blink