Fix some typos, broken links and other issues in extension docs

chrome/common/extensions/api/tabs.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": "tabs",
     "dependencies": [ "extension", "windows" ],
     "types": [
       {
@@ skipping 580 matching lines @@
                 "name": "language",
                 "description": "An ISO language code such as <code>en</code> or <code>fr</code>. For a complete list of languages supported by this method, see <a href='http://src.chromium.org/viewvc/chrome/trunk/src/third_party/cld/languages/internal/languages.cc'>kLanguageInfoTable</a>. The 2nd to 4th columns will be checked and the first non-NULL value will be returned except for Simplified Chinese for which zh-CN will be returned. For an unknown language, <code>und</code> will be returned."
               }
             ]
           }
         ]
       },
       {
         "name": "captureVisibleTab",
         "type": "function",
-        "description": "Captures the visible area of the currently active tab in the specified window. You must have <a href='manifest.html#permissions'>host permission</a> for the URL displayed by the tab.",
+        "description": "Captures the visible area of the currently active tab in the specified window. You must have <a href='declare_permissions.html'>host permission</a> for the URL displayed by the tab.",
         "parameters": [
           {
             "type": "integer",
             "name": "windowId",
             "minimum": -2,
             "optional": true,
             "description": "The target window. Defaults to the <a href='windows.html#current-window'>current window</a>."
           },
           {
             "type": "object",
@@ skipping 294 matching lines @@
       {
         "name": "onRemoved",
         "type": "function",
         "description": "Fired when a tab is closed. Note: A listener can be registered for this event without requesting the 'tabs' permission in the manifest.",
         "parameters": [
           {"type": "integer", "name": "tabId", "minimum": 0},
           {
             "type": "object",
             "name": "removeInfo",
             "properties": {
-              "windowId": {"type": "integer", "minimum": 0, "description": "the window whose tab is closed." },
+              "windowId": {"type": "integer", "minimum": 0, "description": "The window whose tab is closed." },
               "isWindowClosing": {"type": "boolean", "description": "True when the tab is being closed because its window is being closed." }
             }
           }
         ]
       },
       {
         "name": "onReplaced",
         "type": "function",
         "description": "Fired when a tab is replaced with another tab due to prerendering or instant.",
         "parameters": [
           {"type": "integer", "name": "addedTabId", "minimum": 0},
           {"type": "integer", "name": "removedTabId", "minimum": 0}
         ]
       }
     ]
   }
 ]