Implement the ability to layout test Web Worker-based Notifications.

content/shell/browser/layout_test/layout_test_message_filter.cc

Index: content/shell/browser/layout_test/layout_test_message_filter.cc
diff --git a/content/shell/browser/layout_test/layout_test_message_filter.cc b/content/shell/browser/layout_test/layout_test_message_filter.cc
index d0c3b0d82d7400823c1352f65ed9a5a37e114f0b..2b80628b92721c8582885696565f073d88368d11 100644
--- a/content/shell/browser/layout_test/layout_test_message_filter.cc
+++ b/content/shell/browser/layout_test/layout_test_message_filter.cc
@@ -42,6 +42,8 @@ void LayoutTestMessageFilter::OverrideThreadForMessage(
     const IPC::Message& message, BrowserThread::ID* thread) {
   if (message.type() == ShellViewHostMsg_ClearAllDatabases::ID)
     *thread = BrowserThread::FILE;
+  if (message.type() == ShellViewHostMsg_SimulateWebNotificationClick::ID)
+    *thread = BrowserThread::UI;
 }
 
 bool LayoutTestMessageFilter::OnMessageReceived(const IPC::Message& message) {
@@ -58,6 +60,8 @@ bool LayoutTestMessageFilter::OnMessageReceived(const IPC::Message& message) {
                         OnGrantWebNotificationPermission)
     IPC_MESSAGE_HANDLER(ShellViewHostMsg_ClearWebNotificationPermissions,
                         OnClearWebNotificationPermissions)
+    IPC_MESSAGE_HANDLER(ShellViewHostMsg_SimulateWebNotificationClick,
+                        OnSimulateWebNotificationClick)
     IPC_MESSAGE_HANDLER(ShellViewHostMsg_AcceptAllCookies, OnAcceptAllCookies)
     IPC_MESSAGE_HANDLER(ShellViewHostMsg_DeleteAllCookies, OnDeleteAllCookies)
     IPC_MESSAGE_UNHANDLED(handled = false)
@@ -128,6 +132,14 @@ void LayoutTestMessageFilter::OnClearWebNotificationPermissions() {
     manager->ClearPermissions();
 }
 
+void LayoutTestMessageFilter::OnSimulateWebNotificationClick(
+    const std::string& title) {
+  LayoutTestNotificationManager* manager =
+      LayoutTestContentBrowserClient::Get()->GetLayoutTestNotificationManager();
+  if (manager)
+    manager->SimulateClick(title);
+}
+
 void LayoutTestMessageFilter::OnAcceptAllCookies(bool accept) {
   ShellNetworkDelegate::SetAcceptAllCookies(accept);
 }