Add blink-side plumbing for ServiceWorker -> Document postMessage (1/3)

Source/modules/serviceworkers/ServiceWorkerContainer.h

Index: Source/modules/serviceworkers/ServiceWorkerContainer.h
diff --git a/Source/modules/serviceworkers/ServiceWorkerContainer.h b/Source/modules/serviceworkers/ServiceWorkerContainer.h
index f1dd4419884f3221d505f072730b48bded1beeae..31cddf641efdd610e7755af113afa5c09a6e2083 100644
--- a/Source/modules/serviceworkers/ServiceWorkerContainer.h
+++ b/Source/modules/serviceworkers/ServiceWorkerContainer.h
@@ -34,6 +34,7 @@
 #include "bindings/v8/ScriptPromise.h"
 #include "bindings/v8/ScriptWrappable.h"
 #include "core/dom/ContextLifecycleObserver.h"
+#include "core/frame/DOMWindowLifecycleObserver.h"
 #include "public/platform/WebServiceWorkerProviderClient.h"
 #include "wtf/Forward.h"
 #include "wtf/PassRefPtr.h"
@@ -54,6 +55,7 @@ class ServiceWorkerContainer FINAL :
     public RefCounted<ServiceWorkerContainer>,
     public ScriptWrappable,
     public ContextLifecycleObserver,
+    public DOMWindowLifecycleObserver,
     public blink::WebServiceWorkerProviderClient {
 public:
     static PassRefPtr<ServiceWorkerContainer> create(ExecutionContext*);
@@ -66,6 +68,7 @@ public:
 
     // WebServiceWorkerProviderClient overrides.
     virtual void setCurrentServiceWorker(blink::WebServiceWorker*) OVERRIDE;
+    virtual void dispatchMessageEvent(const blink::WebString& message, const blink::WebMessagePortChannelArray&) OVERRIDE;
 
 private:
     explicit ServiceWorkerContainer(ExecutionContext*);