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

content/child/runtime_features.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 "content/child/runtime_features.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/feature_list.h"
@@ skipping 322 matching lines @@
   // be available only when a valid origin trial token is set. This check is
   // done by the generated code of
   // blink::OriginTrials::serviceWorkerNavigationPreloadEnabled(). See the
   // comments in service_worker_version.h for the details.
   if (base::FeatureList::GetInstance()->IsFeatureOverriddenFromCommandLine(
           features::kServiceWorkerNavigationPreload.name,
           base::FeatureList::OVERRIDE_ENABLE_FEATURE)) {
     WebRuntimeFeatures::enableServiceWorkerNavigationPreload(true);
   }
 
-  if (base::FeatureList::IsEnabled(features::kSpeculativeLaunchServiceWorker))
-    WebRuntimeFeatures::enableSpeculativeLaunchServiceWorker(true);
-
   if (base::FeatureList::IsEnabled(features::kGamepadExtensions))
     WebRuntimeFeatures::enableGamepadExtensions(true);
 
   if (base::FeatureList::IsEnabled(features::kCompositeOpaqueFixedPosition))
     WebRuntimeFeatures::enableFeatureFromString("CompositeOpaqueFixedPosition",
         true);
 
   if (!base::FeatureList::IsEnabled(features::kCompositeOpaqueScrollers))
     WebRuntimeFeatures::enableFeatureFromString("CompositeOpaqueScrollers",
         false);
@@ skipping 27 matching lines @@
   if (command_line.HasSwitch(switches::kDisableBlinkFeatures)) {
     std::vector<std::string> disabled_features = base::SplitString(
         command_line.GetSwitchValueASCII(switches::kDisableBlinkFeatures),
         ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
     for (const std::string& feature : disabled_features)
       WebRuntimeFeatures::enableFeatureFromString(feature, false);
   }
 }
 
 }  // namespace content