Remove .html extension from links

chrome/common/extensions/api/declarative_content.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": "declarativeContent",
     "description": "Use the <code>chrome.declarativeContent</code> API to take actions depending on the content of a page, without requiring permission to read the page's content.",
     "types": [
       {
@@ skipping 22 matching lines @@
 //            "items": { "type": "string" }
           },
           "instanceType": {
             "type": "string", "enum": ["declarativeContent.PageStateMatcher"],
             "nodoc": true
           }
         }
       },
       {
         "id": "ShowPageAction",
-        "description": "Declarative event action that shows the extension's $(ref:pageAction page action) while the corresponding conditions are met.  This action can be used without <a href=\"declare_permissions.html#host-permissions\">host permissions</a>, but the extension must have a page action.  If the extension takes the <a href=\"activeTab.html\">activeTab</a> permission, a click on the page action will grant access to the active tab.",
+        "description": "Declarative event action that shows the extension's $(ref:pageAction page action) while the corresponding conditions are met.  This action can be used without <a href=\"declare_permissions#host-permissions\">host permissions</a>, but the extension must have a page action.  If the extension takes the <a href=\"activeTab.html\">activeTab</a> permission, a click on the page action will grant access to the active tab.",
         "type": "object",
         "properties": {
           "instanceType": {
             "type": "string", "enum": ["declarativeContent.ShowPageAction"],
             "nodoc": true
           }
         }
       }
     ],
     "functions": [
     ],
     "events": [
       {
         "name": "onPageChanged",
         "options": {
           "supportsListeners": false,
           "supportsRules": true,
           "conditions": ["declarativeContent.PageStateMatcher"],
           "actions": [
             "declarativeContent.ShowPageAction"
           ]
         }
       }
     ]
   }
 ]