ServiceWorker: Implement 'source' and 'origin' attributes of ExtendableMessageEvent

third_party/WebKit/Source/modules/serviceworkers/ServiceWorker.cpp

Index: third_party/WebKit/Source/modules/serviceworkers/ServiceWorker.cpp
diff --git a/third_party/WebKit/Source/modules/serviceworkers/ServiceWorker.cpp b/third_party/WebKit/Source/modules/serviceworkers/ServiceWorker.cpp
index 16d287892bc8d21b2b1d550f3473cf21fe7da29f..a3a1933757e7a17869aca70df7193e50d7abe781 100644
--- a/third_party/WebKit/Source/modules/serviceworkers/ServiceWorker.cpp
+++ b/third_party/WebKit/Source/modules/serviceworkers/ServiceWorker.cpp
@@ -36,6 +36,7 @@
 #include "core/events/Event.h"
 #include "core/inspector/ConsoleMessage.h"
 #include "modules/EventTargetModules.h"
+#include "modules/serviceworkers/ServiceWorkerContainerClient.h"
 #include "public/platform/WebMessagePortChannel.h"
 #include "public/platform/WebString.h"
 #include "public/platform/modules/serviceworker/WebServiceWorkerState.h"
@@ -49,6 +50,12 @@ const AtomicString& ServiceWorker::interfaceName() const
 
 void ServiceWorker::postMessage(ExecutionContext* context, PassRefPtr<SerializedScriptValue> message, const MessagePortArray* ports, ExceptionState& exceptionState)
 {
+    ServiceWorkerContainerClient* client = ServiceWorkerContainerClient::from(executionContext());
+    if (!client || !client->provider()) {
+        exceptionState.throwDOMException(InvalidStateError, "Failed to post a message: No associated provider is available.");
+        return;
+    }
+
     // Disentangle the port in preparation for sending it to the remote context.
     OwnPtr<MessagePortChannelArray> channels = MessagePort::disentanglePorts(context, ports, exceptionState);
     if (exceptionState.hadException())
@@ -63,7 +70,7 @@ void ServiceWorker::postMessage(ExecutionContext* context, PassRefPtr<Serialized
 
     WebString messageString = message->toWireString();
     OwnPtr<WebMessagePortChannelArray> webChannels = MessagePort::toWebMessagePortChannelArray(channels.release());
-    m_handle->serviceWorker()->postMessage(messageString, webChannels.leakPtr());
+    m_handle->serviceWorker()->postMessage(client->provider(), messageString, webChannels.leakPtr());
 }
 
 void ServiceWorker::internalsTerminate()