Fix message routing for BrowserPlugin in iframe

extensions/common/api/guest_view_internal.json

 // Copyright 2014 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": "guestViewInternal",
     "compiler_options": {
       "implemented_in": "extensions/browser/api/guest_view/guest_view_internal_api.h"
     },
@@ skipping 71 matching lines @@
           }
         ]
       },
       {
         "name": "setAutoSize",
         "type": "function",
         "parameters": [
           {
             "type": "integer",
             "name": "instanceId",
-            "description": "The instance ID of the guest <webview> process. This not exposed to developers through the API."
+            "description": "The instance ID of the guest renderer. This not exposed to developers through the API."

[lazyboy, 2014/12/16 23:57:30]

I'd do this in a separate CL.

[Fady Samuel, 2014/12/17 19:30:35]

Done.

           },
           {
             "$ref": "AutoSizeParams",
             "name": "params"
           },
           {
             "type": "function",
             "name": "callback",
             "parameters": [],
             "optional": true
           }
         ]
       }
     ]
   }
 ]