[Bindings] Remove a redundant option write-file-if-only-changed in bindings

third_party/WebKit/Source/bindings/modules/v8/BUILD.gn

 # 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.
 
 import("//third_party/WebKit/Source/bindings/modules/v8/generated.gni")
 import("//third_party/WebKit/Source/bindings/scripts/scripts.gni")
 import("//third_party/WebKit/Source/modules/modules.gni")
 import("//third_party/WebKit/Source/modules/modules_idl_files.gni")
 
 visibility = [ "//third_party/WebKit/*" ]
@@ skipping 43 matching lines @@
   # Put the IDL file list in a response file to avoid command-line limits.
   response_file_contents =
       rebase_path(core_idl_with_modules_dependency_files, root_build_dir)
 
   args = [
     "--idl-files-list",
     "{{response_file_name}}",
     "--output",
     rebase_path(bindings_modules_generated_init_partial_interfaces_file,
                 root_build_dir),
-    "--write-file-only-if-changed=1",
   ]
 
   deps = [
     "//third_party/WebKit/Source/bindings/modules:interfaces_info",
   ]
 }