Merge branch 'webstorage-exception' into 'master'

Properly handle autosave local storage exceptions.

Addresses https://gitlab.com/gitlab-org/gitlab-ce/issues/1182.

See merge request !1643

CHANGELOG

@@ -40,6 +40,7 @@ v 7.8.2
   - Fix check if user is allowed to view the file attachment
   - Fix import check for case sensetive namespaces
   - Increase timeout for Git-over-HTTP requests to 1 hour since large pulls/pushes can take a long time.
+  - Properly handle autosave local storage exceptions.
 
 v 7.8.1
   - Fix run of custom post receive hooks

app/assets/javascripts/autosave.js.coffee

@@ -14,7 +14,11 @@ class @Autosave
   restore: ->
     return unless window.localStorage?
 
+    try
       text = window.localStorage.getItem @key
+    catch
+      return
+
     @field.val text if text?.length > 0
     @field.trigger "input"    
 
@@ -23,6 +27,7 @@ class @Autosave
 
     text = @field.val()
     if text?.length > 0
+      try
         window.localStorage.setItem @key, text
     else
       @reset()
@@ -30,4 +35,5 @@ class @Autosave
   reset: ->
     return unless window.localStorage?
 
+    try 
       window.localStorage.removeItem @key