Add scale argument in user class

app/helpers/application_helper.rb

@@ -68,13 +68,13 @@ module ApplicationHelper
     end
   end
-  def avatar_icon(user_email = '', size = nil)
+  def avatar_icon(user_email = '', size = nil, scale = 2)
     user = User.find_by(email: user_email)
     if user
       user.avatar_url(size) || default_avatar
     else
-      gravatar_icon(user_email, size)
+      gravatar_icon(user_email, size, scale)
     end
   end

app/models/user.rb

@@ -633,11 +633,11 @@ class User < ActiveRecord::Base
     email.start_with?('temp-email-for-oauth')
   end
-  def avatar_url(size = nil)
+  def avatar_url(size = nil, scale = 2)
     if avatar.present?
       [gitlab_config.url, avatar.url].join
     else
-      GravatarService.new.execute(email, size)
+      GravatarService.new.execute(email, size, scale)
     end
   end