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

third_party/WebKit/Source/platform/network/NetworkHints.cpp

 /*
  * Copyright (C) 2008 Collin Jackson  <collinj@webkit.org>
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 27 matching lines @@
 }
 
 void preconnect(const KURL& url, const CrossOriginAttributeValue crossOrigin) {
   if (WebPrescientNetworking* prescientNetworking =
           Platform::current()->prescientNetworking()) {
     bool allowCredentials = (crossOrigin != CrossOriginAttributeAnonymous);
     prescientNetworking->preconnect(url, allowCredentials);
   }
 }
 
-void sendNavigationHint(const KURL& url, WebNavigationHintType type) {
-  if (WebPrescientNetworking* prescientNetworking =
-          Platform::current()->prescientNetworking()) {
-    prescientNetworking->sendNavigationHint(url, type);
-  }
-}
-
 }  // namespace blink