[Extensions] Convert APIs to use movable types [8]

chrome/common/extensions/api/page_capture.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": "pageCapture",
     "description": "Use the <code>chrome.pageCapture</code> API to save a tab as MHTML.",
+    "compiler_options": {"use_movable_types": true},
     "functions": [
       {
         "name": "saveAsMHTML",
         "type": "function",
         "description": "Saves the content of the tab with given id as MHTML.",
         "parameters": [
           {
             "name": "details",
             "type": "object",
             "properties": {
@@ skipping 15 matching lines @@
                 "optional": true,
                 "description": "The MHTML data as a Blob."
               }
             ]
           }
         ]
       }
     ]
   }
 ]