Added memory limit for chrome.activityLogPrivate returned results

chrome/common/extensions/api/activity_log_private.json

 // Copyright 2013 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": "activityLogPrivate",
     "description": "none",
     "types": [
       {
@@ skipping 23 matching lines @@
           "apiCall": {"type": "string", "optional": true, "description": "Exact match"},
           "pageUrl": {"type": "string", "optional": true, "description": "Treated as a prefix"},
           "argUrl": {"type": "string", "optional": true, "description": "Treated as a prefix"}
         }
       },
       {
         "id": "ActivityResultSet",
         "type": "object",
         "description": "This holds the results of a lookup, the filter of the lookup, the time of the lookup, and whether there are more results that match.",
         "properties": {
-          "activities": {"type": "array", "items": {"$ref": "ExtensionActivity"}},
-          "maxTime": {"type": "integer", "optional": true},
-          "moreResults": {"type": "boolean"}
+          "activities": {"type": "array", "items": {"$ref": "ExtensionActivity"}}
         }
       }
     ],
     "functions": [
       {
         "name": "getExtensionActivities",
         "type": "function",
         "description": "Retrieves activity from the ActivityLog that matches the specified filter.",
         "parameters": [
           {
             "name": "filter",
             "$ref": "Filter",
             "description": "Fill out the fields that you want to search for in the database."
           },
           {
-            "name": "maxTime",
-            "type": "integer",
-            "optional": true,
-            "description": "Specify this if you want results that weren't available in the first page."
-          },
-          {
             "name": "callback",
             "type": "function",
             "parameters": [
               {
                 "name": "result",
                 "$ref": "ActivityResultSet"
               }
             ]
           }
         ]
       }
     ],
     "events": [
       {
         "name": "onExtensionActivity",
         "type": "function",
         "description": "Fired when a given extension performs another activity.",
         "parameters": [
           {
             "name": "activity",
             "$ref": "ExtensionActivity"
           }
         ]
       }
     ]
   }
 ]