Remove --enable-service-worker flag

extensions/common/manifest_constants.cc

 // 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.
 
 #include "extensions/common/manifest_constants.h"
 
 namespace extensions {
 
 namespace manifest_keys {
 
@@ skipping 699 matching lines @@
     "Reserved key * found in message catalog.";
 const char kScriptBadgeRequiresFlag[] =
     "The script_badge manifest key is turned off by default. "
     "You can enable it with the --enable-script-badges command-line flag.";
 const char kScriptBadgeIconIgnored[] =
     "default_icon specified in script_badge manifest section will not be used.";
 const char kScriptBadgeTitleIgnored[] =
     "default_title specified in script_badge manifest section will not be "
     "used.";
 const char kServiceWorkerRequiresFlag[] =
-    "Service worker features require --enable-service-worker command-line "
-    "flag.";
+    "Service worker features require "
+    "--enable-experimental-web-platform-features command-line flag.";
 const char kUnrecognizedManifestKey[] = "Unrecognized manifest key '*'.";
 const char kUnrecognizedManifestProperty[] =
     "Unrecognized property '*' of manifest key '*'.";
 const char kWebRequestConflictsWithLazyBackground[] =
     "The 'webRequest' API cannot be used with event pages.";
 #if defined(OS_CHROMEOS)
 const char kIllegalPlugins[] =
     "Extensions cannot install plugins on Chrome OS";
 #endif
 
 }  // namespace manifest_errors
 
 }  // namespace extensions