[WIP] Speculatively launch Service Workers on mouse/touch events.

content/public/common/content_features.cc

Index: content/public/common/content_features.cc
diff --git a/content/public/common/content_features.cc b/content/public/common/content_features.cc
index b20ac77d1c9830a93bf4803c46fd42c52e068396..28f1aa7ef6d74b7a01e8d7a5fee0c1ca56cef9f8 100644
--- a/content/public/common/content_features.cc
+++ b/content/public/common/content_features.cc
@@ -100,6 +100,10 @@ const base::Feature kRenderingPipelineThrottling{
 const base::Feature kScrollAnchoring{"ScrollAnchoring",
                                      base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Speculatively launches Service Workers on mouse/touch events.
+const base::Feature kSpeculativeLaunchServiceWorker{
+    "SpeculativeLaunchServiceWorker", base::FEATURE_DISABLED_BY_DEFAULT};
+
 // Enables implementation of the Cache-Control: stale-while-revalidate directive
 // which permits servers to allow the use of stale resources while revalidation
 // proceeds in the background. See http://crbug.com/348877