Remove fileBrowserPrivate.transferFile.

chrome/common/extensions/api/file_browser_private.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":"fileBrowserPrivate",
     "description": "none",
     "types": [
       {
@@ skipping 785 matching lines @@
                 "name" : "mountPoints",
                 "type": "array",
                 "items": {"$ref": "MountPointInfo"},
                 "description": "The list of MountPointInfo representing mounted devices."
               }
             ]
           }
         ]
       },
       {
-        "name": "transferFile",
-        "description": "Transfers file from local to remote file system.",
-        "parameters": [
-          {
-            "name": "sourceFileUrl",
-            "type": "string",
-            "description": "Source file from the local file system."
-          },
-          {
-            "name": "destinationFileUrl",
-            "type": "string",
-            "description": "Destination file on the remote file system."
-          },
-          {
-            "name": "callback",
-            "type": "function",
-            "optional": true,
-            "description": "Completion callback. $ref:runtime.lastError will be set if there was an error.",
-            "parameters": []
-          }
-        ]
-      },
-      {
         "name": "cancelFileTransfers",
         "description": "Cancels ongoing file transfers for selected files.",
         "parameters": [
           {
             "name": "fileUrls",
             "type": "array",
             "description": "Array of files for which ongoing transfer should be canceled.",
             "items": {"type": "string"}
           },
           {
@@ skipping 395 matching lines @@
       },
       {
         "name": "onDriveConnectionStatusChanged",
         "type": "function",
         "description": "Fired when the active network connection state changes. The network connection state can be retrieved via 'getDriveConnectionState'.",
         "parameters": []
       }
     ]
   }
 ]