QuotaExceededError - storage - exceeded the quota

Bug
1

From Error logs

Discourse 1.2.0.beta4 - https://github.com/discourse/discourse version 3cea85e09a5a86d7a965fb2ffd8b132659b79db0

###Info

QuotaExceededError: DOM Exception 22: An attempt was made to add something to storage that exceeded the quota.
Url: http://example.com/assets/vendor-0dbc6e71b0ee5428574e3562afe91ef1.js
Line: 5
Column: 20205
Window Location: http://example.com/t/example/66158?utm_medium=email&utm_source=transactional&utm_campaign=club_email

###Env

HTTP_HOST: example.com
REQUEST_URI: /logs/report_js_error
REQUEST_METHOD: POST
HTTP_USER_AGENT: Mozilla/5.0 (iPad; CPU OS 8_1_2 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Version/8.0 Mobile/12B440 Safari/600.1.4
HTTP_ACCEPT: */*
HTTP_REFERER: http://example.com/t/example/66158?utm_medium=email&utm_source=transactional&utm_campaign=club_email
HTTP_X_FORWARDED_FOR: 86.174.1.2
HTTP_X_REAL_IP: 86.174.1.2

params:
  message: QuotaExceededError: DOM Exception 22: An attempt was made to add something to storage that exceeded t
  url: http://example.com/assets/vendor-0dbc6e71b0ee5428574e3562afe91ef1.js
  line: 5
  column: 20205
  window_location: http://example.com/t/example/66158?utm_medium=email&utm_source=transactional&