Update fremontcut with current chrome feature defines

lib/dom/scripts/systemhtml.py

Index: lib/dom/scripts/systemhtml.py
diff --git a/lib/dom/scripts/systemhtml.py b/lib/dom/scripts/systemhtml.py
index da19ea92731bcf85299264ba062811055ed47be2..ef8c2f258203f988db2eba841c6ccf3c420b8e95 100644
--- a/lib/dom/scripts/systemhtml.py
+++ b/lib/dom/scripts/systemhtml.py
@@ -311,6 +311,8 @@ _html_event_names = {
   'canplay': 'canPlay',
   'canplaythrough': 'canPlayThrough',
   'change': 'change',
+  'chargingchange': 'chargingChange',
+  'chargingtimechange': 'chargingTimeChange',
   'checking': 'checking',
   'click': 'click',
   'close': 'close',
@@ -324,6 +326,7 @@ _html_event_names = {
   'dblclick': 'doubleClick',
   'devicemotion': 'deviceMotion',
   'deviceorientation': 'deviceOrientation',
+  'dischargingtimechange': 'dischargingTimeChange',
   'display': 'display',
   'downloading': 'downloading',
   'drag': 'drag',
@@ -347,6 +350,7 @@ _html_event_names = {
   'keydown': 'keyDown',
   'keypress': 'keyPress',
   'keyup': 'keyUp',
+  'levelchange': 'levelChange',
   'load': 'load',
   'loadeddata': 'loadedData',
   'loadedmetadata': 'loadedMetadata',
@@ -416,6 +420,10 @@ _html_event_names = {
   'webkitAnimationStart': 'animationStart',
   'webkitfullscreenchange': 'fullscreenChange',
   'webkitfullscreenerror': 'fullscreenError',
+  'webkitkeyadded': 'keyAdded',
+  'webkitkeyerror': 'keyError',
+  'webkitkeymessage': 'keyMessage',
+  'webkitneedkey': 'needKey',
   'webkitSpeechChange': 'speechChange',
   'webkitTransitionEnd': 'transitionEnd',
   'write': 'write',