Initial implementation of stashed message ports, blink side

Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp

Index: Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp
diff --git a/Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp b/Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp
index 4c4106d9dbad17ffe0e861e296f6b028cf94a42c..e9ded4a3e69ddad02fd12d65478d29a8f940fe2f 100644
--- a/Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp
+++ b/Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp
@@ -51,6 +51,7 @@
 #include "modules/serviceworkers/ServiceWorkerRegistration.h"
 #include "modules/serviceworkers/ServiceWorkerScriptCachedMetadataHandler.h"
 #include "modules/serviceworkers/ServiceWorkerThread.h"
+#include "modules/serviceworkers/StashedPortCollection.h"
 #include "modules/serviceworkers/WaitUntilObserver.h"
 #include "platform/network/ResourceRequest.h"
 #include "platform/weborigin/DatabaseIdentifier.h"
@@ -116,6 +117,13 @@ void ServiceWorkerGlobalScope::didEvaluateWorkerScript()
     m_didEvaluateScript = true;
 }
 
+PassRefPtrWillBeRawPtr<StashedPortCollection> ServiceWorkerGlobalScope::ports()
+{
+    if (!m_ports)
+        m_ports = StashedPortCollection::create(this);
+    return m_ports;
+}
+
 ScriptPromise ServiceWorkerGlobalScope::fetch(ScriptState* scriptState, const RequestInfo& input, const Dictionary& init, ExceptionState& exceptionState)
 {
     return GlobalFetch::fetch(scriptState, *this, input, init, exceptionState);