Stop setting invalid value to the |tab_id| field of fileBrowserHandler API.

chrome/browser/chromeos/extensions/file_manager/private_api_util.h

 // Copyright 2013 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.
 //
 // This file provides utility functions for fileBrowserPrivate API.
 
 #ifndef CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_PRIVATE_API_UTIL_H_
 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_PRIVATE_API_UTIL_H_
 
 #include "base/callback_forward.h"
@@ skipping 30 matching lines @@
 // via private API.
 void VolumeInfoToVolumeMetadata(
     Profile* profile,
     const VolumeInfo& volume_info,
     extensions::api::file_browser_private::VolumeMetadata* volume_metadata);
 
 // Returns the WebContents of the tab associated with the dispatcher. Returns
 // NULL on error.
 content::WebContents* GetWebContents(ExtensionFunctionDispatcher* dispatcher);
 
-// Returns the ID of the tab associated with the dispatcher. Returns 0 on
-// error.
-int32 GetTabId(ExtensionFunctionDispatcher* dispatcher);
-
 // Returns the local FilePath associated with |url|. If the file isn't of the
 // type FileSystemBackend handles, returns an empty
 // FilePath. |render_view_host| and |profile| are needed to obtain the
 // FileSystemContext currently in use.
 //
 // Local paths will look like "/home/chronos/user/Downloads/foo/bar.txt" or
 // "/special/drive/foo/bar.txt".
 base::FilePath GetLocalPathFromURL(
     content::RenderViewHost* render_view_host,
     Profile* profile,
@@ skipping 22 matching lines @@
 void GetSelectedFileInfo(content::RenderViewHost* render_view_host,
                          Profile* profile,
                          const std::vector<GURL>& file_urls,
                          GetSelectedFileInfoLocalPathOption local_path_option,
                          GetSelectedFileInfoCallback callback);
 
 }  // namespace util
 }  // namespace file_manager
 
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_PRIVATE_API_UTIL_H_