Revert 258831 "Revert 258727 "Implement ServiceWorker::postMessage()""

content/child/service_worker/web_service_worker_impl.cc

Index: content/child/service_worker/web_service_worker_impl.cc
diff --git a/content/child/service_worker/web_service_worker_impl.cc b/content/child/service_worker/web_service_worker_impl.cc
index 02d9cf8ca772096907baeb01c944c7a11d9f3a3e..b5b3c4682ffedb2e08e5c63246eafe3138be9b30 100644
--- a/content/child/service_worker/web_service_worker_impl.cc
+++ b/content/child/service_worker/web_service_worker_impl.cc
@@ -4,8 +4,26 @@
 
 #include "content/child/service_worker/web_service_worker_impl.h"
 
+#include "content/child/thread_safe_sender.h"
+#include "content/child/webmessageportchannel_impl.h"
+#include "content/common/service_worker/service_worker_messages.h"
+#include "third_party/WebKit/public/platform/WebString.h"
+
+using blink::WebMessagePortChannel;
+using blink::WebMessagePortChannelArray;
+using blink::WebMessagePortChannelClient;
+using blink::WebString;
+
 namespace content {
 
 WebServiceWorkerImpl::~WebServiceWorkerImpl() {}
 
+void WebServiceWorkerImpl::postMessage(const WebString& message,
+                                       WebMessagePortChannelArray* channels) {
+  thread_safe_sender_->Send(new ServiceWorkerHostMsg_PostMessage(
+      registration_id_,
+      message,
+      WebMessagePortChannelImpl::ExtractMessagePortIDs(channels)));
+}
+
 }  // namespace content