Remove chrome.webstorePrivate.silentlyInstall.

chrome/common/extensions/api/webstorePrivate.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":"webstorePrivate",
     "nodoc": "true",
     "functions": [
       {
@@ skipping 125 matching lines @@
           },
           {
             "name": "callback",
             "type": "function",
             "optional": "true",
             "parameters": []
           }
         ]
       },
       {
-        "name": "silentlyInstall",
-        "description": "Silently installs the specified extension, which must already be whitelisted in Chrome.",
-        "parameters": [
-          {
-            "name": "details",
-            "type": "object",
-            "properties": {
-              "id": {
-                "type": "string",
-                "description": "The id of the extension to be installled.",
-                "minLength": 32,
-                "maxLength": 32
-              },
-              "manifest": {
-                "type": "string",
-                "description": "A string with the contents of the extension's manifest.json file. During the install process, the browser will check that the downloaded extension's manifest matches what was passed in here.",
-                "minLength": 1
-              }
-            }
-          },
-          {
-            "name": "callback",
-            "type": "function",
-            "description": "Called when the extension installation has completed. chrome.extension.lastError may be set if the extension install failed.",
-            "optional": "true",
-            "parameters": []
-          }
-        ]
-      },
-      {
         "name": "getBrowserLogin",
         "description": "Returns the logged-in sync user login if there is one, or the empty string otherwise.",
         "parameters": [
           {
             "name": "callback",
             "type": "function",
             "optional": "false",
             "parameters": [
               {
                 "name": "info",
@@ skipping 74 matching lines @@
                 "type": "string",
                 "enum": ["webgl_allowed", "webgl_blocked"]
               }
             ]
           }
         ]
       }
     ]
   }
 ]