Move graph_commit under gitlab module

app/controllers/projects_controller.rb

-require File.join(Rails.root, 'lib', 'graph_commit')
+require Rails.root.join('lib', 'gitlab', 'graph_commit')
 
 class ProjectsController < ApplicationController
   before_filter :project, except: [:index, :new, :create]
@@ -78,7 +78,7 @@ class ProjectsController < ApplicationController
   end
 
   def graph
-    @days_json, @commits_json = GraphCommit.to_graph(project)
+    @days_json, @commits_json = Gitlab::GraphCommit.to_graph(project)
   end
 
   def destroy

lib/graph_commit.rb → lib/gitlab/graph_commit.rb

 require "grit"
 
-class GraphCommit
+module Gitlab
+  class GraphCommit
     attr_accessor :time, :space
     attr_accessor :refs
 
@@ -178,4 +179,5 @@ class GraphCommit
       @refs = ref_cache[@_commit.id] if ref_cache.include?(@_commit.id)
       @refs ||= []
     end
+  end
 end