Revert of "Speculatively launch Service Workers on mouse/touch events."

chrome/browser/flag_descriptions.h

 // Copyright 2017 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.
 
 #ifndef CHROME_BROWSER_FLAG_DESCRIPTIONS_H_
 #define CHROME_BROWSER_FLAG_DESCRIPTIONS_H_
 
 // Includes needed for macros allowing conditional compilation of some strings.
 #include "build/build_config.h"
 #include "build/buildflag.h"
@@ skipping 1200 matching lines @@
 // same as if the script is in HTTPCache; force caching on the first load. This
 // option describes the 2nd of these, caching same as if the script is in
 // HTTPCache.
 extern const char kV8CacheStrategiesForCacheStorageNormal[];
 
 // The V8 cache for CacheStorage supports three strategies: disabled; caching
 // same as if the script is in HTTPCache; force caching on the first load. This
 // option describes the 3rd of these, force caching on the first load.
 extern const char kV8CacheStrategiesForCacheStorageAggressive[];
 
-// Name of the about::flags setting for speculative launch of service workers.
-extern const char kSpeculativeLaunchServiceWorkerName[];
-
-// Description of the about::flags setting for speculative launch of service
-// workers.
-extern const char kSpeculativeLaunchServiceWorkerDescription[];
-
 // An about::flags experiment title to enable/disable memory coordinator
 extern const char kMemoryCoordinatorName[];
 
 // Description of an about::flags to enable/disable memory coordinator
 extern const char kMemoryCoordinatorDescription[];
 
 // Name of the about::flags setting for service worker navigation preload.
 extern const char kServiceWorkerNavigationPreloadName[];
 
 // Description of the about::flags setting for service worker navigation
@@ skipping 1909 matching lines @@
 
 // Description of the about: flag enabling emoji, handwriting and voice input on
 // opt-in IME menu.
 extern const char kEnableEhvInputDescription[];
 
 #endif  // #if defined(OS_CHROMEOS)
 
 }  // namespace flag_descriptions
 
 #endif  // CHROME_BROWSER_FLAG_DESCRIPTIONS_H_