Supporting more APIs with json_schema_compiler

chrome/common/extensions/api/systemPrivate.json

 [
   {
     "namespace": "systemPrivate",
     "nodoc": true,
     "types": [
       {
         "id": "UpdateStatus",
         "type": "object",
         "description": "Information about the system update.",
         "properties": {
           "state": {
             "type": "string",
             "enum": ["NotAvailable", "Updating", "NeedRestart"],
             "description": "State of system update.  NotAvailable when there is no available update or the update system is in error state, Updating when a system update is in progress, NeedRestart when a system update is finished and restart is needed."
           },
           "downloadProgress": {
             "type": "number",
             "description": "Value between 0 and 1 describing the progress of system update download.  This value will be set to 0 when |state| is NotAvailable, 1 when NeedRestart."
           }
         }
       },
       {
         "id": "VolumeInfo",
         "type": "object",
         "description": "Information about the volume.",
         "properties": {
-          "volume": {"type": "double", "description": "The value of the volume percent. This must be between 0.0 and 100.0."},
+          "volume": {"type": "number", "description": "The value of the volume percent. This must be between 0.0 and 100.0."},
           "isVolumeMuted": {"type": "boolean", "description": "True if the volume is muted."}
         }
       },
       {
         "id": "BrightnessChangeInfo",
         "type": "object",
         "description": "Information about a change to the screen brightness.",
         "properties": {
           "brightness": {
             "type": "number",
@@ skipping 79 matching lines @@
       },
       {
         "name": "onWokeUp",
         "type": "function",
         "description": "Fired when the device wakes up from sleep.",
         "parameters": []
       }
     ]
   }
 ]