Add support for references in different paths in apis

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",
     "description": "Use the <code>chrome.tabs</code> API to interact with the browser's tab system. You can use this API to create, modify, and rearrange tabs in the browser.",
     "types": [
       {
@@ skipping 636 matching lines @@
         "description": "Captures the visible area of the currently active tab in the specified window. You must have <a href='declare_permissions'>&lt;all_urls&gt;</a> permission to use this method.",
         "parameters": [
           {
             "type": "integer",
             "name": "windowId",
             "minimum": -2,
             "optional": true,
             "description": "The target window. Defaults to the <a href='windows#current-window'>current window</a>."
           },
           {
-            "$ref": "types.ImageDetails",
+            "$ref": "extension_types.ImageDetails",

[not at google - send to devlin, 2014/08/25 22:22:47]

ideally this should be extesionTypes.ImageDetails. API namespaces are always
camelcase.

[lfg, 2014/08/26 16:15:21]

Done.

             "name": "options",
             "optional": true
           },
           {
             "type": "function", "name": "callback", "parameters": [
               {"type": "string", "name": "dataUrl", "description": "A data URL which encodes an image of the visible area of the captured tab. May be assigned to the 'src' property of an HTML Image element for display."}
             ]
           }
         ]
       },
@@ skipping 409 matching lines @@
             "tabId": {"type": "integer", "minimum": 0},
             "oldZoomFactor": {"type": "number"},
             "newZoomFactor": {"type": "number"},
             "zoomSettings": {"$ref": "ZoomSettings"}
           }
         }]
       }
     ]
   }
 ]