Support file system access in DevTools with isolated file system.

chrome/chrome.gyp

 # 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.
 {
   'variables': {
     'chromium_code': 1,
 
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
     # the link of the actual chrome (or chromium) executable on
@@ skipping 192 matching lines @@
             '../third_party/leveldatabase/leveldatabase.gyp:leveldatabase',
           ],
           'include_dirs': [
             '..',
           ],
           'sources': [
             'browser/devtools/browser_list_tabcontents_provider.cc',
             'browser/devtools/browser_list_tabcontents_provider.h',
             'browser/devtools/devtools_file_helper.cc',
             'browser/devtools/devtools_file_helper.h',
+            'browser/devtools/devtools_file_system_helper.cc',
+            'browser/devtools/devtools_file_system_helper.h',
             'browser/devtools/devtools_toggle_action.h',
             'browser/devtools/devtools_window.cc',
             'browser/devtools/devtools_window.h',
             'browser/devtools/remote_debugging_server.cc',
             'browser/devtools/remote_debugging_server.h',
           ],
           'conditions': [
             ['toolkit_uses_gtk == 1', {
               'dependencies': [
                 '../build/linux/system.gyp:gtk',
@@ skipping 863 matching lines @@
             '../build/java.gypi',
           ],
         },
       ], # 'targets'
       'includes': [
         'chrome_android.gypi',
       ]}, # 'includes'
     ],  # OS=="android"
   ],  # 'conditions'
 }