service worker: navigation preload basic setters/getters and flag

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

Index: third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorker.h
diff --git a/third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorker.h b/third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorker.h
index 5e6f2f5a8ba27e0a207029ed86323a14d13ab22b..1bf9b86e4aba7bcb3caec3791bac174261f2b0ab 100644
--- a/third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorker.h
+++ b/third_party/WebKit/public/platform/modules/serviceworker/WebServiceWorker.h
@@ -31,11 +31,13 @@
 #ifndef WebServiceWorker_h
 #define WebServiceWorker_h
 
+#include "public/platform/WebCallbacks.h"
 #include "public/platform/WebCommon.h"
 #include "public/platform/WebMessagePortChannel.h"
 #include "public/platform/WebString.h"
 #include "public/platform/WebURL.h"
 #include "public/platform/WebVector.h"
+#include "public/platform/modules/serviceworker/WebServiceWorkerError.h"
 #include "public/platform/modules/serviceworker/WebServiceWorkerState.h"
 
 namespace blink {
@@ -47,6 +49,11 @@ typedef WebVector<class WebMessagePortChannel*> WebMessagePortChannelArray;
 
 class WebServiceWorker {
  public:
+  using WebSetNavigationPreloadCallbacks =
+      WebCallbacks<void, const WebServiceWorkerError&>;
+  using WebGetNavigationPreloadCallbacks =
+      WebCallbacks<const WebString&, const WebServiceWorkerError&>;
+
   // The handle interface that retains a reference to the implementation of
   // WebServiceWorker in the embedder and is owned by ServiceWorker object in
   // Blink. The embedder must keep the service worker representation while
@@ -78,6 +85,9 @@ class WebServiceWorker {
                            const WebSecurityOrigin&,
                            WebMessagePortChannelArray*) = 0;
 
+  virtual void setNavigationPreload(const WebString& /* value */,
+                                    WebSetNavigationPreloadCallbacks*) {}
+  virtual void getNavigationPreload(WebGetNavigationPreloadCallbacks*) {}
   virtual void terminate() {}
 };
 }