Perform ClientHello padding if the field trial is enabled

net/ssl/ssl_config_service.h

Index: net/ssl/ssl_config_service.h
diff --git a/net/ssl/ssl_config_service.h b/net/ssl/ssl_config_service.h
index e074309ffac1f7c4407134367e4591a19893eff4..c4704e5e2375341ffe369b00a296c1500340b52e 100644
--- a/net/ssl/ssl_config_service.h
+++ b/net/ssl/ssl_config_service.h
@@ -16,6 +16,8 @@
 
 namespace net {
 
+class HostPortPair;
+
 // The interface for retrieving the SSL configuration.  This interface
 // does not cover setting the SSL configuration, as on some systems, the
 // SSLConfigService objects may not have direct access to the configuration, or
@@ -66,6 +68,9 @@ class NET_EXPORT SSLConfigService
   // called on the IO thread.
   void NotifySSLConfigChange();
 
+  // Returns true if the |host_and_port| should use fastradio padding.
+  virtual bool SupportsFastradioPadding(const HostPortPair& host_and_port);
+
  protected:
   friend class base::RefCountedThreadSafe<SSLConfigService>;