Implement device-ram client hints header

third_party/WebKit/Source/platform/loader/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 "platform/PlatformExport.h"
 #include "platform/wtf/Allocator.h"
 #include "platform/wtf/text/WTFString.h"
 
 namespace blink {
 
 class PLATFORM_EXPORT ClientHintsPreferences {
   DISALLOW_NEW();
 
  public:
   class Context {
    public:
+    virtual void CountClientHintsDeviceRAM() = 0;
     virtual void CountClientHintsDPR() = 0;
     virtual void CountClientHintsResourceWidth() = 0;
     virtual void CountClientHintsViewportWidth() = 0;
 
    protected:
     virtual ~Context() {}
   };
 
   ClientHintsPreferences();
 
   void UpdateFrom(const ClientHintsPreferences&);
   void UpdateFromAcceptClientHintsHeader(const String& header_value, Context*);
 
+  bool ShouldSendDeviceRAM() const { return should_send_device_ram_; }
+  void SetShouldSendDeviceRAM(bool should) { should_send_device_ram_ = should; }
+
   bool ShouldSendDPR() const { return should_send_dpr_; }
   void SetShouldSendDPR(bool should) { should_send_dpr_ = should; }
 
   bool ShouldSendResourceWidth() const { return should_send_resource_width_; }
   void SetShouldSendResourceWidth(bool should) {
     should_send_resource_width_ = should;
   }
 
   bool ShouldSendViewportWidth() const { return should_send_viewport_width_; }
   void SetShouldSendViewportWidth(bool should) {
     should_send_viewport_width_ = should;
   }
 
  private:
+  bool should_send_device_ram_;
   bool should_send_dpr_;
   bool should_send_resource_width_;
   bool should_send_viewport_width_;
 };
 
 }  // namespace blink
 
 #endif