Browser Plugin: Add HTML5-like postMessage support

content/renderer/browser_plugin/browser_plugin_browsertest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/browser_plugin/browser_plugin_browsertest.h"
 
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "content/common/browser_plugin_messages.h"
@@ skipping 226 matching lines @@
   ASSERT_TRUE(browser_plugin);
 
   WebKit::WebCursorInfo cursor_info;
   // Send an event and verify that the event is deported.
   browser_plugin->handleInputEvent(WebKit::WebMouseEvent(),
                                    cursor_info);
   EXPECT_TRUE(browser_plugin_manager()->sink().GetUniqueMessageMatching(
       BrowserPluginHostMsg_HandleInputEvent::ID));
   browser_plugin_manager()->sink().ClearMessages();
 
-  const char* kAddEventListener =
+  const char* kAddCustomEventListener =
     "var msg;"
     "function crashListener() {"
     "  msg = 'crashed';"
     "}"
     "document.getElementById('browserplugin')."
-    "    addEventListener('crash', crashListener);";
+    "    addCustomEventListener('crash', crashListener);";
 
-  ExecuteJavaScript(kAddEventListener);
+  ExecuteJavaScript(kAddCustomEventListener);
 
   // Pretend that the guest has crashed
   browser_plugin->GuestCrashed();
 
   // Verify that our event listener has fired.
   EXPECT_EQ("crashed", ExecuteScriptAndReturnString("msg"));
 
   // Send an event and verify that events are no longer deported.
   browser_plugin->handleInputEvent(WebKit::WebMouseEvent(),
                                    cursor_info);
@@ skipping 10 matching lines @@
   EXPECT_FALSE(browser_plugin_manager()->sink().GetUniqueMessageMatching(
       BrowserPluginHostMsg_PluginDestroyed::ID));
   ExecuteJavaScript("x = document.getElementById('browserplugin'); "
                     "x.parentNode.removeChild(x);");
   ProcessPendingMessages();
   EXPECT_TRUE(browser_plugin_manager()->sink().GetUniqueMessageMatching(
       BrowserPluginHostMsg_PluginDestroyed::ID));
 }
 
 TEST_F(BrowserPluginTest, CustomEvents) {
-  const char* kAddEventListener =
+  const char* kAddCustomEventListener =
     "var url;"
     "function nav(u) {"
     "  url = u;"
     "}"
     "document.getElementById('browserplugin')."
-    "    addEventListener('navigation', nav);";
-  const char* kRemoveEventListener =
+    "    addCustomEventListener('navigation', nav);";
+  const char* kRemoveCustomEventListener =
     "document.getElementById('browserplugin')."
-    "    removeEventListener('navigation', nav);";
+    "    removeCustomEventListener('navigation', nav);";
   const char* kGoogleURL = "http://www.google.com/";
   const char* kGoogleNewsURL = "http://news.google.com/";
 
   LoadHTML(GetHTMLForBrowserPluginObject().c_str());
-  ExecuteJavaScript(kAddEventListener);
+  ExecuteJavaScript(kAddCustomEventListener);
   // Grab the BrowserPlugin's instance ID from its resize message.
   const IPC::Message* msg =
       browser_plugin_manager()->sink().GetFirstMessageMatching(
           BrowserPluginHostMsg_ResizeGuest::ID);
   ASSERT_TRUE(msg);
   PickleIterator iter = IPC::SyncMessage::GetDataIterator(msg);
   BrowserPluginHostMsg_ResizeGuest::SendParam  resize_params;
   ASSERT_TRUE(IPC::ReadParam(msg, &iter, &resize_params));
   int instance_id = resize_params.a;
 
   MockBrowserPlugin* browser_plugin =
       static_cast<MockBrowserPlugin*>(
           browser_plugin_manager()->GetBrowserPlugin(instance_id));
   ASSERT_TRUE(browser_plugin);
 
   browser_plugin->DidNavigate(GURL(kGoogleURL));
   EXPECT_EQ(kGoogleURL, ExecuteScriptAndReturnString("url"));
 
-  ExecuteJavaScript(kRemoveEventListener);
+  ExecuteJavaScript(kRemoveCustomEventListener);
   browser_plugin->DidNavigate(GURL(kGoogleNewsURL));
   // The URL variable should not change because we've removed the event
   // listener.
   EXPECT_EQ(kGoogleURL, ExecuteScriptAndReturnString("url"));
 }
 
+TEST_F(BrowserPluginTest, PostMessage) {
+  const char* kTesting = "testing123";
+  const char* kPostMessage =
+    "var msg;"
+    "function receiveMessage(event) {"
+    "  msg = event.data;"
+    "}"
+    "document.getElementById('browserplugin')."
+    "    addEventListener('message', receiveMessage, false);"
+    "document.getElementById('browserplugin')."
+    "    postMessage('testing123', '');";
+
+  LoadHTML(GetHTMLForBrowserPluginObject().c_str());
+  ExecuteJavaScript(kPostMessage);
+
+  const IPC::Message* msg =
+    browser_plugin_manager()->sink().GetUniqueMessageMatching(
+        BrowserPluginHostMsg_RouteMessageEvent::ID);
+  ASSERT_TRUE(msg);
+  int instance_id;
+  string16 data;
+  string16 target_origin;
+  PickleIterator iter(*msg);
+  ASSERT_TRUE(IPC::ReadParam(msg, &iter, &instance_id));
+  ASSERT_TRUE(IPC::ReadParam(msg, &iter, &data));
+  ASSERT_TRUE(IPC::ReadParam(msg, &iter, &target_origin));
+
+  MockBrowserPlugin* browser_plugin =
+      static_cast<MockBrowserPlugin*>(
+          browser_plugin_manager()->GetBrowserPlugin(instance_id));
+  ASSERT_TRUE(browser_plugin);
+
+  // Fire a message event in the embedder and verify that it fires.
+  browser_plugin->ReceiveMessage(MSG_ROUTING_NONE, string16(), data);
+  ProcessPendingMessages();
+  EXPECT_EQ(kTesting, ExecuteScriptAndReturnString("msg"));
+}
+
 }  // namespace content