service worker: Implement NavigationPreloadManager.setHeaderValue

third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerRegistration.h

Index: third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerRegistration.h
diff --git a/third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerRegistration.h b/third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerRegistration.h
index 980fa38bdd991732220755652a3079a7bbad168b..b8f755021d703f64c2c1d15935f23dc2ab851d60 100644
--- a/third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerRegistration.h
+++ b/third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorkerRegistration.h
@@ -32,6 +32,8 @@ class WebServiceWorkerRegistration {
   using WebGetNavigationPreloadStateCallbacks =
       WebCallbacks<const WebNavigationPreloadState&,
                    const WebServiceWorkerError&>;
+  using WebSetNavigationPreloadHeaderCallbacks =
+      WebCallbacks<void, const WebServiceWorkerError&>;
 
   // The handle interface that retains a reference to the implementation of
   // WebServiceWorkerRegistration in the embedder and is owned by
@@ -60,6 +62,10 @@ class WebServiceWorkerRegistration {
   virtual void getNavigationPreloadState(
       WebServiceWorkerProvider*,
       std::unique_ptr<WebGetNavigationPreloadStateCallbacks>) {}
+  virtual void setNavigationPreloadHeader(
+      const WebString& value,
+      WebServiceWorkerProvider*,
+      std::unique_ptr<WebSetNavigationPreloadHeaderCallbacks>) {}
 };
 
 }  // namespace blink