Add support for redirecting ResourceHandlers to a blob: URL

chrome/common/extensions/api/file_browser_handler.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":"fileBrowserHandler",
     "platforms": ["chromeos"],
     "types": [
       {
@@ skipping 37 matching lines @@
         "name": "onExecuteContentHandler",
         "type": "function",
         "description": "Fired when a resource is fetched which matches a mime type handled by this extension. The resource request is cancelled, and the extension is expected to handle the request. The event is restricted to a small number of white-listed fileBrowserHandlers.",
         "parameters": [
           {
             "name": "mime_type",
             "type": "string",
             "description": "The MIME type of the intercepted URL request."
           },
           {
+            "name": "original_url",
+            "type": "string",
+            "description": "The original URL that was intercepted."
+          },
+          {
             "name": "content_url",
             "type": "string",
             "description": "The intercepted URL request. The handler should fetch and handle data referenced by the URL."
           }
         ]
       }
     ],
 
     "functions": [
       {
@@ skipping 41 matching lines @@
                   }
                 }
               }
             ]
           }
         ]
       }
     ]
   }
 ]