Generates the DTLS identity in browser process and returns it to render process.

content/browser/media/dtls_identity_store_browsertest.cc

+// Copyright (c) 2013 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 "base/command_line.h"
+#include "content/browser/renderer_host/media/dtls_identity_service_host.h"
+#include "content/browser/web_contents/web_contents_impl.h"
+#include "content/common/media/dtls_identity_messages.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/render_process_host.h"
+#include "content/public/test/browser_test_utils.h"
+#include "content/shell/shell.h"
+#include "content/test/content_browser_test.h"
+#include "content/test/content_browser_test_utils.h"
+
+namespace content {
+namespace {
+
+class DummyListener : public IPC::Listener {

[jam, 2013/06/06 16:22:32]

this isn't used

[jiayl, 2013/06/06 17:07:37]

Done.

+ public:
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE {
+    return true;
+  }
+};
+
+class DTLSIdentityStoreBrowserTest : public ContentBrowserTest {
+ public:
+  DTLSIdentityStoreBrowserTest() {}
+  virtual ~DTLSIdentityStoreBrowserTest() {}
+
+  void CheckGetOrGenerateIdentity() {
+    int render_process_id =
+        shell()->web_contents()->GetRenderProcessHost()->GetID();
+    GURL url("http://google.com");
+    DTLSIdentityMsg_GetOrGenerate msg(url, "b", "c");
+    scoped_refptr<DTLSIdentityServiceHost> host =
+        new DTLSIdentityServiceHost(render_process_id);
+    bool ok = true;
+    host->OnMessageReceived(msg, &ok);

[jam, 2013/06/06 16:22:32]

what is the point of this test? i.e. what failure conditions are you look for?

because it looks like it'll pass even if this method doesn't get called. also
checking that an IPC handler returns true doesn't tell much, all that means is
that it dispatched the IPC

[jiayl, 2013/06/06 17:07:37]

I want to check the IPC handling and DTLSIdentityStore do not throw any error,
like asserting on the wrong thread. 
Could the method not get called? Does not the navigation pump the IO thread
tasks?

[jam, 2013/06/07 00:46:49]

i'm just saying if there was an error that got introduced in this code, and it
didn't run, then this test would silently fail.

when you say threading, how can it fail? are you testing that
BrowserMessageFilter is working? that should be tested by BMF, not every
consumer

i think this test as written is pretty weak and it's not useful. the unit test
seems more appropriate since it actually checks that an operation succeeded

+    ASSERT_EQ(true, ok);
+  }
+};
+
+IN_PROC_BROWSER_TEST_F(DTLSIdentityStoreBrowserTest, GetOrGenerate) {
+  content::BrowserThread::PostTask(
+      content::BrowserThread::IO,
+      FROM_HERE,
+      base::Bind(&DTLSIdentityStoreBrowserTest::CheckGetOrGenerateIdentity,
+                 base::Unretained(this)));
+  NavigateToURL(shell(), GURL("about:blank"));
+}
+
+}  // namespace
+}  // namespace content