Implement device-ram client hints header

third_party/WebKit/Source/platform/loader/fetch/ClientHintsPreferences.h

Index: third_party/WebKit/Source/platform/loader/fetch/ClientHintsPreferences.h
diff --git a/third_party/WebKit/Source/platform/loader/fetch/ClientHintsPreferences.h b/third_party/WebKit/Source/platform/loader/fetch/ClientHintsPreferences.h
index a25e21800c8622c6f90d00d8f1d599112482bf9f..72f96f4983082fe70d3ecd917df036634fcf8e52 100644
--- a/third_party/WebKit/Source/platform/loader/fetch/ClientHintsPreferences.h
+++ b/third_party/WebKit/Source/platform/loader/fetch/ClientHintsPreferences.h
@@ -17,6 +17,7 @@ class PLATFORM_EXPORT ClientHintsPreferences {
  public:
   class Context {
    public:
+    virtual void CountClientHintsDeviceRam() = 0;
     virtual void CountClientHintsDPR() = 0;
     virtual void CountClientHintsResourceWidth() = 0;
     virtual void CountClientHintsViewportWidth() = 0;
@@ -30,6 +31,9 @@ class PLATFORM_EXPORT 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; }
 
@@ -44,6 +48,7 @@ class PLATFORM_EXPORT ClientHintsPreferences {
   }
 
  private:
+  bool should_send_device_ram_;
   bool should_send_dpr_;
   bool should_send_resource_width_;
   bool should_send_viewport_width_;