Route key_exchange_group over to DevTools.

content/public/common/resource_response_info.h

Index: content/public/common/resource_response_info.h
diff --git a/content/public/common/resource_response_info.h b/content/public/common/resource_response_info.h
index a94054dbc331fe12bd159bebc059c31421492b43..0b646a271020b4bb1f17551b2c411ea8a3511e1f 100644
--- a/content/public/common/resource_response_info.h
+++ b/content/public/common/resource_response_info.h
@@ -170,6 +170,11 @@ struct CONTENT_EXPORT ResourceResponseInfo {
   // the renderer process set report_raw_headers to true.
   int ssl_connection_status;
 
+  // The key exchange group used by the SSL connection or zero if unknown or not
+  // applicable. Only present if the renderer process set report_raw_headers to
+  // true.
+  uint16_t ssl_key_exchange_group;
+
   // List of Signed Certificate Timestamps (SCTs) and their corresponding
   // validation status. Only present if the renderer process set
   // report_raw_headers to true.