switch from log_event to Logger.log

keep log_event for compatibility

lms/static/coffee/spec/navigation_spec.coffee

@@ -57,8 +57,7 @@ describe 'Navigation', ->
 
   describe 'log', ->
     beforeEach ->
-      window.log_event = ->
-      spyOn window, 'log_event'
+      spyOn Logger, 'log'
 
     it 'submit event log', ->
       @navigation.log {}, {
@@ -68,6 +67,6 @@ describe 'Navigation', ->
           text: -> "old"
       }
 
-      expect(window.log_event).toHaveBeenCalledWith 'accordion',
+      expect(Logger.log).toHaveBeenCalledWith 'accordion',
         newheader: 'new'
         oldheader: 'old'

lms/static/coffee/src/navigation.coffee

@@ -20,7 +20,7 @@ class @Navigation
       $('#accordion a').click @setChapter
 
   log: (event, ui) ->
-    log_event 'accordion',
+    Logger.log 'accordion',
       newheader: ui.newHeader.text()
       oldheader: ui.oldHeader.text()