Split methods for ClientHintsPreferences from FrameFetchContext

third_party/WebKit/Source/core/fetch/ClientHintsPreferences.h

 // 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.
 
 #ifndef ClientHintsPreferences_h
 #define ClientHintsPreferences_h
 
 #include "core/CoreExport.h"
 #include "wtf/Allocator.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
-class ResourceFetcher;
-
 class CORE_EXPORT ClientHintsPreferences {
   DISALLOW_NEW();
 
  public:
+  class Context {
+   public:
+    virtual void countClientHintsDPR() = 0;
+    virtual void countClientHintsResourceWidth() = 0;
+    virtual void countClientHintsViewportWidth() = 0;
+
+   protected:
+    virtual ~Context() {}
+  };
+
   ClientHintsPreferences();
 
   void updateFrom(const ClientHintsPreferences&);
-  void updateFromAcceptClientHintsHeader(const String& headerValue,
-                                         ResourceFetcher*);
+  void updateFromAcceptClientHintsHeader(const String& headerValue, Context*);
 
   bool shouldSendDPR() const { return m_shouldSendDPR; }
   void setShouldSendDPR(bool should) { m_shouldSendDPR = should; }
 
   bool shouldSendResourceWidth() const { return m_shouldSendResourceWidth; }
   void setShouldSendResourceWidth(bool should) {
     m_shouldSendResourceWidth = should;
   }
 
   bool shouldSendViewportWidth() const { return m_shouldSendViewportWidth; }
   void setShouldSendViewportWidth(bool should) {
     m_shouldSendViewportWidth = should;
   }
 
  private:
   bool m_shouldSendDPR;
   bool m_shouldSendResourceWidth;
   bool m_shouldSendViewportWidth;
 };
 
 }  // namespace blink
 
 #endif