ServiceWorker: Add support for .skipWaiting and controllerchange event(1/3)

Source/modules/serviceworkers/ServiceWorkerGlobalScopeClient.h

Index: Source/modules/serviceworkers/ServiceWorkerGlobalScopeClient.h
diff --git a/Source/modules/serviceworkers/ServiceWorkerGlobalScopeClient.h b/Source/modules/serviceworkers/ServiceWorkerGlobalScopeClient.h
index 37deb2bc481f2d9753a71bcfd2fd307c78258ab1..7b199553ce4a049db5bbc204de4c1c740d3dda2d 100644
--- a/Source/modules/serviceworkers/ServiceWorkerGlobalScopeClient.h
+++ b/Source/modules/serviceworkers/ServiceWorkerGlobalScopeClient.h
@@ -33,10 +33,10 @@
 
 #include "core/dom/MessagePort.h"
 #include "core/workers/WorkerClients.h"
-#include "public/platform/WebCallbacks.h"
 #include "public/platform/WebMessagePortChannel.h"
 #include "public/platform/WebServiceWorkerClientsInfo.h"
 #include "public/platform/WebServiceWorkerEventResult.h"
+#include "public/platform/WebServiceWorkerSkipWaitingCallbacks.h"
 #include "wtf/Forward.h"
 #include "wtf/Noncopyable.h"
 
@@ -68,6 +68,7 @@ public:
     virtual void didHandlePushEvent(int pushEventID, WebServiceWorkerEventResult) = 0;
     virtual void didHandleSyncEvent(int syncEventID) = 0;
     virtual void postMessageToClient(int clientID, const WebString& message, PassOwnPtr<WebMessagePortChannelArray>) = 0;
+    virtual void skipWaiting(WebServiceWorkerSkipWaitingCallbacks*) = 0;
 
     static const char* supplementName();
     static ServiceWorkerGlobalScopeClient* from(ExecutionContext*);