service worker: Plumb NavigationPreloadManager.enable/disable to browser-side

third_party/WebKit/Source/modules/serviceworkers/NavigationPreloadCallbacks.h

 // Copyright 2016 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 NavigationPreloadCallbacks_h
 #define NavigationPreloadCallbacks_h
 
 #include "public/platform/modules/serviceworker/WebServiceWorkerRegistration.h"
 
 namespace blink {
 
 class ScriptPromiseResolver;
 struct WebServiceWorkerError;
 
 class EnableNavigationPreloadCallbacks final
     : public WebServiceWorkerRegistration::WebEnableNavigationPreloadCallbacks {
  public:
   EnableNavigationPreloadCallbacks(ScriptPromiseResolver*);
   ~EnableNavigationPreloadCallbacks() override;
 
   // WebEnableNavigationPreloadCallbacks interface.
   void onSuccess() override;
   void onError(const WebServiceWorkerError&) override;
 
  private:
   Persistent<ScriptPromiseResolver> m_resolver;
   WTF_MAKE_NONCOPYABLE(EnableNavigationPreloadCallbacks);
 };
 
-class DisableNavigationPreloadCallbacks final
-    : public WebServiceWorkerRegistration::
-          WebDisableNavigationPreloadCallbacks {
- public:
-  DisableNavigationPreloadCallbacks(ScriptPromiseResolver*);
-  ~DisableNavigationPreloadCallbacks() override;
-
-  // WebDisableNavigationPreloadCallbacks interface.
-  void onSuccess() override;
-  void onError(const WebServiceWorkerError&) override;
-
- private:
-  Persistent<ScriptPromiseResolver> m_resolver;
-  WTF_MAKE_NONCOPYABLE(DisableNavigationPreloadCallbacks);
-};
-
 }  // namespace blink
 
 #endif  // NavigationPreloadCallbacks_h