Introduce chrome://flags/#network-prediction-options-for-service-worker

chrome/common/chrome_switches.cc

 // 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.
 
 #include "chrome/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "build/build_config.h"
 #include "ppapi/features/features.h"
@@ skipping 685 matching lines @@
 const char kPrerenderFromOmnibox[]          = "prerender-from-omnibox";
 
 // These are the values the kPrerenderFromOmnibox switch may have, as in
 // "--prerender-from-omnibox=auto". auto: Allow field trial selection.
 const char kPrerenderFromOmniboxSwitchValueAuto[] = "auto";
 //   disabled: No prerendering.
 const char kPrerenderFromOmniboxSwitchValueDisabled[] = "disabled";
 //   enabled: Guaranteed prerendering.
 const char kPrerenderFromOmniboxSwitchValueEnabled[] = "enabled";
 
+// Network prediction options for service worker controlled pages.
+// - PreconnectOnly (default): Execute the preconnection on navigations.
+// - StartServiceWorkerAndPreconnect: Start the service worker and execute the
+//   preconnection in parallel on navigations.
+// - StartServiceWorkerAndDeferPreconnect: Start the service worker on
+//   navigations, and defer the preconnection until the service worker startup.
+// - StartServiceWorkerOnly: Start the service worker on navigations and do not
+//   execute the preconnection.
+// See https://crbug.com/727544 for the details.
+const char kNetworkPredictionOptionsForServiceWorker[] =
+    "network-prediction-options-for-service-worker";
+
 // Use IPv6 only for privet HTTP.
 const char kPrivetIPv6Only[]                   = "privet-ipv6-only";
 
 // Outputs the product version information and quit. Used as an internal api to
 // detect the installed version of Chrome on Linux.
 const char kProductVersion[]                = "product-version";
 
 // Selects directory of profile to associate with the first browser launched.
 const char kProfileDirectory[]              = "profile-directory";
 
@@ skipping 480 matching lines @@
 
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR VERY NICE FLAGS TO THE BOTTOM OF THIS FILE.
 //
 // You were going to just dump your switches here, weren't you? Instead, please
 // put them in alphabetical order above, or in order inside the appropriate
 // ifdef at the bottom. The order should match the header.
 // -----------------------------------------------------------------------------
 
 }  // namespace switches