Browser Plugin: Add HTML5-like postMessage support

content/browser/browser_plugin/browser_plugin_host_browsertest.cc

Index: content/browser/browser_plugin/browser_plugin_host_browsertest.cc
diff --git a/content/browser/browser_plugin/browser_plugin_host_browsertest.cc b/content/browser/browser_plugin/browser_plugin_host_browsertest.cc
index 6c9a689ff2f1876091025688d5795e7ebd67b584..902ffa4b8d8cd5d8b767b889ddd1faa444b0e4e2 100644
--- a/content/browser/browser_plugin/browser_plugin_host_browsertest.cc
+++ b/content/browser/browser_plugin/browser_plugin_host_browsertest.cc
@@ -262,7 +262,6 @@ IN_PROC_BROWSER_TEST_F(BrowserPluginHostTest, NavigateAfterResize) {
   TestBrowserPluginGuest* test_guest = static_cast<TestBrowserPluginGuest*>(
       test_guest_web_contents->GetBrowserPluginGuest());
 
-
   // Wait for the guest to send an UpdateRectMsg, the dimensions should be
   // 100 x 200.
   ASSERT_TRUE(test_guest->WaitForUpdateRectMsgWithSize(nxt_width, nxt_height));
@@ -446,4 +445,61 @@ IN_PROC_BROWSER_TEST_F(BrowserPluginHostTest, EmbedderSameAfterNav) {
   ASSERT_EQ(test_embedder_after_nav, test_embedder_);
 }
 
+// This test verifies that round trip postMessage works as expected.
+// 1. The embedder posts a message to the guest.
+// 2. The guest receives and replies to the message using the event object's
+// source object: event.source.postMessage(...)
+// 3. The embedder receives the message and uses the event object's source
+// object to do one final reply.
+// 4. The guest receives the final 'stop' message.
+// 5. The guest acks the 'stop' message with a 'stop_ack' message.
+// 6. The embedder changes its title to 'stop_ack' when it sees the string.
+IN_PROC_BROWSER_TEST_F(BrowserPluginHostTest, PostMessage) {
+  const char* kTesting = "testing123";
+  ASSERT_TRUE(test_server()->Start());
+
+  GURL test_url(test_server()->GetURL("files/browser_plugin_embedder.html"));
+  NavigateToURL(shell(), test_url);
+
+  WebContentsImpl* embedder_web_contents = static_cast<WebContentsImpl*>(
+      shell()->web_contents());
+  RenderViewHostImpl* rvh = static_cast<RenderViewHostImpl*>(
+      embedder_web_contents->GetRenderViewHost());
+
+  test_url = test_server()->GetURL(
+      "files/browser_plugin_post_message_guest.html");
+  rvh->ExecuteJavascriptAndGetValue(string16(), ASCIIToUTF16(
+      StringPrintf("SetSrc('%s');", test_url.spec().c_str())));
+
+  // Wait to make sure embedder is created/attached to WebContents.
+  ASSERT_TRUE(
+      TestBrowserPluginHostFactory::GetInstance()->WaitForEmbedderCreation());
+
+  TestBrowserPluginEmbedder* test_embedder =
+      static_cast<TestBrowserPluginEmbedder*>(
+          embedder_web_contents->GetBrowserPluginEmbedder());
+  ASSERT_TRUE(test_embedder);
+  ASSERT_TRUE(test_embedder->WaitForGuestAdded());
+
+  // Verify that we have exactly one guest.
+  const BrowserPluginEmbedder::ContainerInstanceMap& instance_map =
+      test_embedder->guest_web_contents_for_testing();
+  EXPECT_EQ(1u, instance_map.size());
+
+  WebContentsImpl* test_guest_web_contents = static_cast<WebContentsImpl*>(
+      instance_map.begin()->second);
+  TestBrowserPluginGuest* test_guest = static_cast<TestBrowserPluginGuest*>(
+      test_guest_web_contents->GetBrowserPluginGuest());
+  ASSERT_TRUE(test_guest->WaitForUpdateRectMsg());
+
+  rvh->ExecuteJavascriptAndGetValue(string16(), ASCIIToUTF16(
+      StringPrintf("PostMessage('%s');", kTesting)));
+
+  // The title will be updated to "stop_ack" if the fol

[nasko, 2012/09/19 21:19:59]

What is "fol"?

[Fady Samuel, 2012/09/20 15:24:28]

Done.

+  const string16 expected_title = ASCIIToUTF16("stop_ack");
+  content::TitleWatcher title_watcher(embedder_web_contents, expected_title);
+  string16 actual_title = title_watcher.WaitAndGetTitle();
+  EXPECT_EQ(expected_title, actual_title);
+}
+
 }  // namespace content