Reset registered events and dispatch runtime.onInstalled to all extensions when

chrome/common/extensions/api/runtime.json

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 [
   {
     "namespace": "runtime",
     "documentation_permissions_required": ["runtime"],
     "properties": {
       "lastError": {
@@ skipping 72 matching lines @@
     ],
     "events": [
       {
         "name": "onStartup",
         "type": "function",
         "description": "Fired when the browser first starts up."
       },
       {
         "name": "onInstalled",
         "type": "function",
-        "description": "Fired when the extension is first installed, and on each update to a new version.",
+        "description": "Fired when the extension is first installed, when the extension is updated to a new version, and when Chrome is updated to a new version.",
         "parameters": [
           {
             "type": "object",
             "name": "details",
             "properties": {
               "reason": {
                 "type": "string",
-                "enum": ["install", "update"],
+                "enum": ["install", "update", "chrome_update"],
                 "description": "The reason that this event is being dispatched."
               },
               "previousVersion": {
                 "type": "string",
                 "optional": true,
                 "description": "Indicates the previous version of the extension, which has just been updated. This is present only if 'reason' is 'update'."
               }
             }
           }
         ]
       },
       {
         "name": "onSuspend",
         "type": "function",
         "description": "Sent to the event page just before it is unloaded. This gives the extension opportunity to do some clean up. Note that since the page is unloading, any asynchronous operations started while handling this event are not guaranteed to complete. If more activity for the event page occurs before it gets unloaded the onSuspendCanceled event will be sent and the page won't be unloaded. "
       },
       {
         "name": "onSuspendCanceled",
         "type": "function",
         "description": "Sent after onSuspend() to indicate that the app won't be unloaded after all."
       }
     ]
   }
 ]