Update from https://crrev.com/311076

net/http/http_server_properties.h

Index: net/http/http_server_properties.h
diff --git a/net/http/http_server_properties.h b/net/http/http_server_properties.h
index ce939e1b2db52c36f4ec8d2cf9a662a66e77bf77..79ce33d6d794bd020f4bd1a4ed80e01585d735b4 100644
--- a/net/http/http_server_properties.h
+++ b/net/http/http_server_properties.h
@@ -20,6 +20,8 @@
 
 namespace net {
 
+struct SSLConfig;
+
 enum AlternateProtocolUsage {
   // Alternate Protocol was used without racing a normal connection.
   ALTERNATE_PROTOCOL_USAGE_NO_RACE = 0,
@@ -168,6 +170,19 @@ class NET_EXPORT HttpServerProperties {
   virtual void SetSupportsSpdy(const HostPortPair& server,
                                bool support_spdy) = 0;
 
+  // Returns true if |server| has required HTTP/1.1 via HTTP/2 error code.
+  virtual bool RequiresHTTP11(const HostPortPair& server) = 0;
+
+  // Require HTTP/1.1 on subsequent connections.  Not persisted.
+  virtual void SetHTTP11Required(const HostPortPair& server) = 0;
+
+  // Modify SSLConfig to force HTTP/1.1.
+  static void ForceHTTP11(SSLConfig* ssl_config);
+
+  // Modify SSLConfig to force HTTP/1.1 if necessary.
+  virtual void MaybeForceHTTP11(const HostPortPair& server,
+                                SSLConfig* ssl_config) = 0;
+
   // Returns true if |server| has an Alternate-Protocol header.
   virtual bool HasAlternateProtocol(const HostPortPair& server) = 0;