HTML MessagePort as mojo::MessagePipeHandle

content/browser/shared_worker/shared_worker_service_impl_unittest.cc

Index: content/browser/shared_worker/shared_worker_service_impl_unittest.cc
diff --git a/content/browser/shared_worker/shared_worker_service_impl_unittest.cc b/content/browser/shared_worker/shared_worker_service_impl_unittest.cc
index fec5578f1563e04323c72b229efad7a74f3e2c1d..db5c128404b9e9d56479dd37830e975d5a7a503a 100644
--- a/content/browser/shared_worker/shared_worker_service_impl_unittest.cc
+++ b/content/browser/shared_worker/shared_worker_service_impl_unittest.cc
@@ -18,10 +18,9 @@
 #include "base/strings/string16.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/lock.h"
-#include "content/browser/message_port_message_filter.h"
+#include "base/synchronization/waitable_event.h"
 #include "content/browser/shared_worker/shared_worker_message_filter.h"
 #include "content/browser/shared_worker/worker_storage_partition.h"
-#include "content/common/message_port_messages.h"
 #include "content/common/view_messages.h"
 #include "content/common/worker_messages.h"
 #include "content/public/browser/storage_partition.h"
@@ -112,30 +111,17 @@ static const int kProcessIDs[] = {100, 101, 102};
 static const unsigned long long kDocumentIDs[] = {200, 201, 202};
 static const int kRenderFrameRouteIDs[] = {300, 301, 302};
 
-class MockMessagePortMessageFilter : public MessagePortMessageFilter {
- public:
-  MockMessagePortMessageFilter(
-      const NextRoutingIDCallback& callback,
-      std::vector<std::unique_ptr<IPC::Message>>* message_queue)
-      : MessagePortMessageFilter(callback), message_queue_(message_queue) {}
-
-  bool Send(IPC::Message* message) override {
-    std::unique_ptr<IPC::Message> owned(message);
-    if (!message_queue_)
-      return false;
-    message_queue_->push_back(std::move(owned));
-    return true;
-  }
-
-  void Close() {
-    message_queue_ = nullptr;
-    OnChannelClosing();
-  }
+void BlockingReadFromMessagePort(MessagePort port, base::string16* message) {
+  base::WaitableEvent event(base::WaitableEvent::ResetPolicy::MANUAL,
+                            base::WaitableEvent::InitialState::NOT_SIGNALED);
+  port.SetCallback(
+      base::Bind(&base::WaitableEvent::Signal, base::Unretained(&event)));
+  event.Wait();
 
- private:
-  ~MockMessagePortMessageFilter() override {}
-  std::vector<std::unique_ptr<IPC::Message>>* message_queue_;
-};
+  std::vector<MessagePort> should_be_empty;
+  EXPECT_TRUE(port.GetMessage(message, &should_be_empty));
+  EXPECT_TRUE(should_be_empty.empty());
+}
 
 class MockSharedWorkerMessageFilter : public SharedWorkerMessageFilter {
  public:
@@ -143,12 +129,12 @@ class MockSharedWorkerMessageFilter : public SharedWorkerMessageFilter {
       int render_process_id,
       ResourceContext* resource_context,
       const WorkerStoragePartition& partition,
-      MessagePortMessageFilter* message_port_filter,
+      const SharedWorkerMessageFilter::NextRoutingIDCallback& callback,
       std::vector<std::unique_ptr<IPC::Message>>* message_queue)
       : SharedWorkerMessageFilter(render_process_id,
                                   resource_context,
                                   partition,
-                                  message_port_filter),
+                                  callback),
         message_queue_(message_queue) {}
 
   bool Send(IPC::Message* message) override {
@@ -175,28 +161,24 @@ class MockRendererProcessHost {
                           ResourceContext* resource_context,
                           const WorkerStoragePartition& partition)
       : process_id_(process_id),
-        message_filter_(new MockMessagePortMessageFilter(
+        worker_filter_(new MockSharedWorkerMessageFilter(
+            process_id,
+            resource_context,
+            partition,
             base::Bind(&base::AtomicSequenceNumber::GetNext,
                        base::Unretained(&next_routing_id_)),
-            &queued_messages_)),
-        worker_filter_(new MockSharedWorkerMessageFilter(process_id,
-                                                         resource_context,
-                                                         partition,
-                                                         message_filter_.get(),
-                                                         &queued_messages_)) {
+            &queued_messages_)) {
     SharedWorkerServiceImplTest::RegisterRunningProcessID(process_id);
   }
 
   ~MockRendererProcessHost() {
     SharedWorkerServiceImplTest::UnregisterRunningProcessID(process_id_);
-    message_filter_->Close();
     worker_filter_->Close();
   }
 
   bool OnMessageReceived(IPC::Message* message) {
     std::unique_ptr<IPC::Message> msg(message);
-    const bool ret = message_filter_->OnMessageReceived(*message) ||
-                     worker_filter_->OnMessageReceived(*message);
+    const bool ret = worker_filter_->OnMessageReceived(*message);
     if (message->is_sync()) {
       CHECK(!queued_messages_.empty());
       std::unique_ptr<IPC::Message> response_msg(
@@ -228,25 +210,9 @@ class MockRendererProcessHost {
   const int process_id_;
   std::vector<std::unique_ptr<IPC::Message>> queued_messages_;
   base::AtomicSequenceNumber next_routing_id_;
-  scoped_refptr<MockMessagePortMessageFilter> message_filter_;
   scoped_refptr<MockSharedWorkerMessageFilter> worker_filter_;
 };
 
-void CreateMessagePortPair(MockRendererProcessHost* renderer,
-                           int* route_1,
-                           int* port_1,
-                           int* route_2,
-                           int* port_2) {
-  EXPECT_TRUE(renderer->OnMessageReceived(
-      new MessagePortHostMsg_CreateMessagePort(route_1, port_1)));
-  EXPECT_TRUE(renderer->OnMessageReceived(
-      new MessagePortHostMsg_CreateMessagePort(route_2, port_2)));
-  EXPECT_TRUE(renderer->OnMessageReceived(
-      new MessagePortHostMsg_Entangle(*port_1, *port_2)));
-  EXPECT_TRUE(renderer->OnMessageReceived(
-      new MessagePortHostMsg_Entangle(*port_2, *port_1)));
-}
-
 void PostCreateWorker(MockRendererProcessHost* renderer,
                       const std::string& url,
                       const std::string& name,
@@ -269,61 +235,31 @@ void PostCreateWorker(MockRendererProcessHost* renderer,
 class MockSharedWorkerConnector {
  public:
   MockSharedWorkerConnector(MockRendererProcessHost* renderer_host)
-      : renderer_host_(renderer_host),
-        temporary_remote_port_route_id_(0),
-        remote_port_id_(0),
-        local_port_route_id_(0),
-        local_port_id_(0) {}
+      : renderer_host_(renderer_host) {}
   void Create(const std::string& url,
               const std::string& name,
               unsigned long long document_id,
               int render_frame_route_id) {
-    CreateMessagePortPair(renderer_host_,
-                          &temporary_remote_port_route_id_,
-                          &remote_port_id_,
-                          &local_port_route_id_,
-                          &local_port_id_);
     PostCreateWorker(renderer_host_, url, name, document_id,
                      render_frame_route_id, &create_worker_reply_);
   }
-  void SendQueueMessages() {
-    EXPECT_TRUE(renderer_host_->OnMessageReceived(
-        new MessagePortHostMsg_QueueMessages(remote_port_id_)));
-  }
-  void SendPostMessage(const std::string& data) {
-    const std::vector<int> empty_ports;
-    EXPECT_TRUE(
-        renderer_host_->OnMessageReceived(new MessagePortHostMsg_PostMessage(
-            local_port_id_, base::ASCIIToUTF16(data), empty_ports)));
-  }
   void SendConnect() {
+    mojo::MessagePipe message_pipe;
+    local_port_ = MessagePort(std::move(message_pipe.handle0));
+
     EXPECT_TRUE(
         renderer_host_->OnMessageReceived(new ViewHostMsg_ConnectToWorker(
-            create_worker_reply_.route_id, remote_port_id_)));
-  }
-  void SendSendQueuedMessages(
-      const std::vector<QueuedMessage>& queued_messages) {
-    EXPECT_TRUE(renderer_host_->OnMessageReceived(
-        new MessagePortHostMsg_SendQueuedMessages(remote_port_id_,
-                                                  queued_messages)));
+            create_worker_reply_.route_id,
+            MessagePort(std::move(message_pipe.handle1)))));
   }
-  int temporary_remote_port_route_id() {
-    return temporary_remote_port_route_id_;
-  }
-  int remote_port_id() { return remote_port_id_; }
-  int local_port_route_id() { return local_port_route_id_; }
-  int local_port_id() { return local_port_id_; }
+  MessagePort local_port() { return local_port_; }
   int route_id() { return create_worker_reply_.route_id; }
   blink::WebWorkerCreationError creation_error() {
     return create_worker_reply_.error;
   }
-
  private:
   MockRendererProcessHost* renderer_host_;
-  int temporary_remote_port_route_id_;
-  int remote_port_id_;
-  int local_port_route_id_;
-  int local_port_id_;
+  MessagePort local_port_;
   ViewHostMsg_CreateWorker_Reply create_worker_reply_;
 };
 
@@ -363,37 +299,17 @@ void CheckViewMsgCountFeature(MockRendererProcessHost* renderer_host,
   EXPECT_EQ(expected_feature, feature);
 }
 
-void CheckMessagePortMsgMessagesQueued(MockRendererProcessHost* renderer_host,
-                                       MockSharedWorkerConnector* connector) {
-  std::unique_ptr<IPC::Message> msg(renderer_host->PopMessage());
-  EXPECT_EQ(MessagePortMsg_MessagesQueued::ID, msg->type());
-  EXPECT_EQ(connector->temporary_remote_port_route_id(), msg->routing_id());
-}
-
 void CheckWorkerMsgConnect(MockRendererProcessHost* renderer_host,
                            int expected_msg_route_id,
-                           int expected_sent_message_port_id,
-                           int* routing_id) {
+                           int* connection_request_id,
+                           MessagePort* port) {
   std::unique_ptr<IPC::Message> msg(renderer_host->PopMessage());
   EXPECT_EQ(WorkerMsg_Connect::ID, msg->type());
   EXPECT_EQ(expected_msg_route_id, msg->routing_id());
   WorkerMsg_Connect::Param params;
   EXPECT_TRUE(WorkerMsg_Connect::Read(msg.get(), &params));
-  int port_id = std::get<0>(params);
-  *routing_id = std::get<1>(params);
-  EXPECT_EQ(expected_sent_message_port_id, port_id);
-}
-
-void CheckMessagePortMsgMessage(MockRendererProcessHost* renderer_host,
-                                int expected_msg_route_id,
-                                std::string expected_data) {
-  std::unique_ptr<IPC::Message> msg(renderer_host->PopMessage());
-  EXPECT_EQ(MessagePortMsg_Message::ID, msg->type());
-  EXPECT_EQ(expected_msg_route_id, msg->routing_id());
-  MessagePortMsg_Message::Param params;
-  EXPECT_TRUE(MessagePortMsg_Message::Read(msg.get(), &params));
-  base::string16 data = std::get<0>(params);
-  EXPECT_EQ(base::ASCIIToUTF16(expected_data), data);
+  *connection_request_id = std::get<0>(params);
+  *port = std::get<1>(params);
 }
 
 void CheckViewMsgWorkerConnected(MockRendererProcessHost* renderer_host,
@@ -418,15 +334,12 @@ TEST_F(SharedWorkerServiceImplTest, BasicTest) {
   std::unique_ptr<MockSharedWorkerConnector> connector(
       new MockSharedWorkerConnector(renderer_host.get()));
   int worker_route_id;
-  int worker_msg_port_route_id;
 
-  // SharedWorkerConnector creates two message ports and sends
-  // ViewHostMsg_CreateWorker.
+  // Sends ViewHostMsg_CreateWorker.
   connector->Create("http://example.com/w.js",
                     "name",
                     kDocumentIDs[0],
                     kRenderFrameRouteIDs[0]);
-  // We need to go to UI thread to call ReserveRenderProcessOnUI().
   RunAllPendingInMessageLoop();
   EXPECT_EQ(2U, renderer_host->QueuedMessageCount());
   // WorkerProcessMsg_CreateWorker should be sent to the renderer in which
@@ -439,29 +352,15 @@ TEST_F(SharedWorkerServiceImplTest, BasicTest) {
   // ViewMsg_WorkerCreated(1) should be sent back to SharedWorkerConnector side.
   CheckViewMsgWorkerCreated(renderer_host.get(), connector.get());
 
-  // SharedWorkerConnector side sends MessagePortHostMsg_QueueMessages in
-  // WebSharedWorkerProxy::connect.
-  connector->SendQueueMessages();
-  EXPECT_EQ(1U, renderer_host->QueuedMessageCount());
-  // MessagePortMsg_MessagesQueued(2) should be sent back to
-  // SharedWorkerConnector side.
-  CheckMessagePortMsgMessagesQueued(renderer_host.get(), connector.get());
-
   // When SharedWorkerConnector receives ViewMsg_WorkerCreated(1), it sends
-  // WorkerMsg_Connect wrapped in ViewHostMsg_ForwardToWorker.
+  // WorkerMsg_Connect via ViewHostMsg_ConnectToWorker.
   connector->SendConnect();
   EXPECT_EQ(1U, renderer_host->QueuedMessageCount());
   // WorkerMsg_Connect should be sent to SharedWorker side.
-  CheckWorkerMsgConnect(renderer_host.get(),
-                        worker_route_id,
-                        connector->remote_port_id(),
-                        &worker_msg_port_route_id);
-
-  // When SharedWorkerConnector receives MessagePortMsg_MessagesQueued(2), it
-  // sends MessagePortHostMsg_SendQueuedMessages.
-  std::vector<QueuedMessage> empty_messages;
-  connector->SendSendQueuedMessages(empty_messages);
-  EXPECT_EQ(0U, renderer_host->QueuedMessageCount());
+  int worker_msg_connection_request_id;
+  MessagePort worker_msg_port;
+  CheckWorkerMsgConnect(renderer_host.get(), worker_route_id,
+                        &worker_msg_connection_request_id, &worker_msg_port);
 
   // SharedWorker sends WorkerHostMsg_WorkerReadyForInspection in
   // EmbeddedSharedWorkerStub::WorkerReadyForInspection().
@@ -479,29 +378,19 @@ TEST_F(SharedWorkerServiceImplTest, BasicTest) {
   // EmbeddedSharedWorkerStub::workerScriptLoaded().
   EXPECT_TRUE(
       renderer_host->OnMessageReceived(new WorkerHostMsg_WorkerConnected(
-          connector->remote_port_id(), worker_route_id)));
+          worker_msg_connection_request_id, worker_route_id)));
   EXPECT_EQ(1U, renderer_host->QueuedMessageCount());
   // ViewMsg_WorkerConnected should be sent to SharedWorkerConnector side.
   CheckViewMsgWorkerConnected(renderer_host.get(), connector.get(),
                               std::set<uint32_t>());
 
-  // When SharedWorkerConnector side sends MessagePortHostMsg_PostMessage,
-  // SharedWorker side shuold receive MessagePortMsg_Message.
-  connector->SendPostMessage("test1");
-  EXPECT_EQ(1U, renderer_host->QueuedMessageCount());
-  CheckMessagePortMsgMessage(
-      renderer_host.get(), worker_msg_port_route_id, "test1");
-
-  // When SharedWorker side sends MessagePortHostMsg_PostMessage,
-  // SharedWorkerConnector side shuold receive MessagePortMsg_Message.
-  const std::vector<int> empty_ports;
-  EXPECT_TRUE(
-      renderer_host->OnMessageReceived(new MessagePortHostMsg_PostMessage(
-          connector->remote_port_id(),
-          base::ASCIIToUTF16("test2"), empty_ports)));
-  EXPECT_EQ(1U, renderer_host->QueuedMessageCount());
-  CheckMessagePortMsgMessage(
-      renderer_host.get(), connector->local_port_route_id(), "test2");
+  // Verify that |worker_msg_port| corresponds to |connector->local_port()|.
+  base::string16 expected_message(base::ASCIIToUTF16("test1"));
+  connector->local_port().PostMessage(expected_message,
+                                      std::vector<MessagePort>());
+  base::string16 received_message;
+  BlockingReadFromMessagePort(worker_msg_port, &received_message);
+  EXPECT_EQ(expected_message, received_message);
 
   // SharedWorker sends WorkerHostMsg_CountFeature in
   // EmbeddedSharedWorkerStub::CountFeature().
@@ -538,15 +427,12 @@ TEST_F(SharedWorkerServiceImplTest, TwoRendererTest) {
   std::unique_ptr<MockSharedWorkerConnector> connector0(
       new MockSharedWorkerConnector(renderer_host0.get()));
   int worker_route_id;
-  int worker_msg_port_route_id1;
 
-  // SharedWorkerConnector creates two message ports and sends
-  // ViewHostMsg_CreateWorker.
+  // Sends ViewHostMsg_CreateWorker.
   connector0->Create("http://example.com/w.js",
                      "name",
                      kDocumentIDs[0],
                      kRenderFrameRouteIDs[0]);
-  // We need to go to UI thread to call ReserveRenderProcessOnUI().
   RunAllPendingInMessageLoop();
   EXPECT_EQ(2U, renderer_host0->QueuedMessageCount());
   // WorkerProcessMsg_CreateWorker should be sent to the renderer in which
@@ -559,29 +445,15 @@ TEST_F(SharedWorkerServiceImplTest, TwoRendererTest) {
   // ViewMsg_WorkerCreated(1) should be sent back to SharedWorkerConnector side.
   CheckViewMsgWorkerCreated(renderer_host0.get(), connector0.get());
 
-  // SharedWorkerConnector side sends MessagePortHostMsg_QueueMessages in
-  // WebSharedWorkerProxy::connect.
-  connector0->SendQueueMessages();
-  EXPECT_EQ(1U, renderer_host0->QueuedMessageCount());
-  // MessagePortMsg_MessagesQueued(2) should be sent back to
-  // SharedWorkerConnector side.
-  CheckMessagePortMsgMessagesQueued(renderer_host0.get(), connector0.get());
-
   // When SharedWorkerConnector receives ViewMsg_WorkerCreated(1), it sends
   // WorkerMsg_Connect wrapped in ViewHostMsg_ForwardToWorker.
   connector0->SendConnect();
   EXPECT_EQ(1U, renderer_host0->QueuedMessageCount());
   // WorkerMsg_Connect should be sent to SharedWorker side.
-  CheckWorkerMsgConnect(renderer_host0.get(),
-                        worker_route_id,
-                        connector0->remote_port_id(),
-                        &worker_msg_port_route_id1);
-
-  // When SharedWorkerConnector receives MessagePortMsg_MessagesQueued(2), it
-  // sends MessagePortHostMsg_SendQueuedMessages.
-  std::vector<QueuedMessage> empty_messages;
-  connector0->SendSendQueuedMessages(empty_messages);
-  EXPECT_EQ(0U, renderer_host0->QueuedMessageCount());
+  int worker_msg_connection_request_id1;
+  MessagePort worker_msg_port1;
+  CheckWorkerMsgConnect(renderer_host0.get(), worker_route_id,
+                        &worker_msg_connection_request_id1, &worker_msg_port1);
 
   // SharedWorker sends WorkerHostMsg_WorkerReadyForInspection in
   // EmbeddedSharedWorkerStub::WorkerReadyForInspection().
@@ -599,29 +471,19 @@ TEST_F(SharedWorkerServiceImplTest, TwoRendererTest) {
   // EmbeddedSharedWorkerStub::workerScriptLoaded().
   EXPECT_TRUE(
       renderer_host0->OnMessageReceived(new WorkerHostMsg_WorkerConnected(
-          connector0->remote_port_id(), worker_route_id)));
+          worker_msg_connection_request_id1, worker_route_id)));
   EXPECT_EQ(1U, renderer_host0->QueuedMessageCount());
   // ViewMsg_WorkerConnected should be sent to SharedWorkerConnector side.
   CheckViewMsgWorkerConnected(renderer_host0.get(), connector0.get(),
                               std::set<uint32_t>());
 
-  // When SharedWorkerConnector side sends MessagePortHostMsg_PostMessage,
-  // SharedWorker side shuold receive MessagePortMsg_Message.
-  connector0->SendPostMessage("test1");
-  EXPECT_EQ(1U, renderer_host0->QueuedMessageCount());
-  CheckMessagePortMsgMessage(
-      renderer_host0.get(), worker_msg_port_route_id1, "test1");
-
-  // When SharedWorker side sends MessagePortHostMsg_PostMessage,
-  // SharedWorkerConnector side shuold receive MessagePortMsg_Message.
-  const std::vector<int> empty_ports;
-  EXPECT_TRUE(
-      renderer_host0->OnMessageReceived(new MessagePortHostMsg_PostMessage(
-          connector0->remote_port_id(),
-          base::ASCIIToUTF16("test2"), empty_ports)));
-  EXPECT_EQ(1U, renderer_host0->QueuedMessageCount());
-  CheckMessagePortMsgMessage(
-      renderer_host0.get(), connector0->local_port_route_id(), "test2");
+  // Verify that |worker_msg_port1| corresponds to |connector0->local_port()|.
+  base::string16 expected_message1(base::ASCIIToUTF16("test1"));
+  connector0->local_port().PostMessage(expected_message1,
+                                       std::vector<MessagePort>());
+  base::string16 received_message1;
+  BlockingReadFromMessagePort(worker_msg_port1, &received_message1);
+  EXPECT_EQ(expected_message1, received_message1);
 
   // SharedWorker sends WorkerHostMsg_CountFeature in
   // EmbeddedSharedWorkerStub::CountFeature().
@@ -645,7 +507,6 @@ TEST_F(SharedWorkerServiceImplTest, TwoRendererTest) {
                                   *partition_.get()));
   std::unique_ptr<MockSharedWorkerConnector> connector1(
       new MockSharedWorkerConnector(renderer_host1.get()));
-  int worker_msg_port_route_id2;
 
   // UpdateWorkerDependency should not be called yet.
   EXPECT_EQ(0, s_update_worker_dependency_call_count_);
@@ -668,55 +529,33 @@ TEST_F(SharedWorkerServiceImplTest, TwoRendererTest) {
   EXPECT_EQ(kProcessIDs[0], s_worker_dependency_added_ids_[0]);
   EXPECT_EQ(0U, s_worker_dependency_removed_ids_.size());
 
-  // SharedWorkerConnector side sends MessagePortHostMsg_QueueMessages in
-  // WebSharedWorkerProxy::connect.
-  connector1->SendQueueMessages();
-  EXPECT_EQ(1U, renderer_host1->QueuedMessageCount());
-  // MessagePortMsg_MessagesQueued(4) should be sent back to
-  // SharedWorkerConnector side.
-  CheckMessagePortMsgMessagesQueued(renderer_host1.get(), connector1.get());
-
   // When SharedWorkerConnector receives ViewMsg_WorkerCreated(3), it sends
   // WorkerMsg_Connect wrapped in ViewHostMsg_ForwardToWorker.
   connector1->SendConnect();
   EXPECT_EQ(1U, renderer_host0->QueuedMessageCount());
   // WorkerMsg_Connect should be sent to SharedWorker side.
-  CheckWorkerMsgConnect(renderer_host0.get(),
-                        worker_route_id,
-                        connector1->remote_port_id(),
-                        &worker_msg_port_route_id2);
-
-  // When SharedWorkerConnector receives MessagePortMsg_MessagesQueued(4), it
-  // sends MessagePortHostMsg_SendQueuedMessages.
-  connector1->SendSendQueuedMessages(empty_messages);
-  EXPECT_EQ(0U, renderer_host1->QueuedMessageCount());
+  int worker_msg_connection_request_id2;
+  MessagePort worker_msg_port2;
+  CheckWorkerMsgConnect(renderer_host0.get(), worker_route_id,
+                        &worker_msg_connection_request_id2, &worker_msg_port2);
 
   // SharedWorker sends WorkerHostMsg_WorkerConnected in
   // EmbeddedSharedWorkerStub::OnConnect().
   EXPECT_TRUE(
       renderer_host0->OnMessageReceived(new WorkerHostMsg_WorkerConnected(
-          connector1->remote_port_id(), worker_route_id)));
+          worker_msg_connection_request_id2, worker_route_id)));
   EXPECT_EQ(1U, renderer_host1->QueuedMessageCount());
   // ViewMsg_WorkerConnected should be sent to SharedWorkerConnector side.
   CheckViewMsgWorkerConnected(renderer_host1.get(), connector1.get(),
                               {feature1, feature2});
 
-  // When SharedWorkerConnector side sends MessagePortHostMsg_PostMessage,
-  // SharedWorker side shuold receive MessagePortMsg_Message.
-  connector1->SendPostMessage("test3");
-  EXPECT_EQ(1U, renderer_host0->QueuedMessageCount());
-  CheckMessagePortMsgMessage(
-      renderer_host0.get(), worker_msg_port_route_id2, "test3");
-
-  // When SharedWorker side sends MessagePortHostMsg_PostMessage,
-  // SharedWorkerConnector side shuold receive MessagePortMsg_Message.
-  EXPECT_TRUE(
-      renderer_host0->OnMessageReceived(new MessagePortHostMsg_PostMessage(
-          connector1->remote_port_id(),
-          base::ASCIIToUTF16("test4"), empty_ports)));
-  EXPECT_EQ(1U, renderer_host1->QueuedMessageCount());
-  CheckMessagePortMsgMessage(
-      renderer_host1.get(), connector1->local_port_route_id(), "test4");
+  // Verify that |worker_msg_port2| corresponds to |connector1->local_port()|.
+  base::string16 expected_message2(base::ASCIIToUTF16("test2"));
+  connector1->local_port().PostMessage(expected_message2,
+                                       std::vector<MessagePort>());
+  base::string16 received_message2;
+  BlockingReadFromMessagePort(worker_msg_port2, &received_message2);
+  EXPECT_EQ(expected_message2, received_message2);
 
   // SharedWorker sends WorkerHostMsg_CountFeature in
   // EmbeddedSharedWorkerStub::CountFeature(). These used_features are already