Don't crash on chrome.runtime.connect().

chrome/browser/extensions/extension_messages_apitest.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 "base/base64.h"
 #include "base/files/file_path.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/path_service.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 861 matching lines @@
     EXPECT_NE(incognito_frame1, incognito_frame2);
 
     EXPECT_EQ(1U, infobar_service1->infobar_count());
     EXPECT_EQ(OK, CanConnectAndSendMessagesToFrame(incognito_frame2, app.get(),
                                                    NULL));
     EXPECT_EQ(1, alert_tracker.GetAndResetAlertCount());
     EXPECT_EQ(0U, infobar_service1->infobar_count());
   }
 }
 
+IN_PROC_BROWSER_TEST_F(ExternallyConnectableMessagingTest, IllegalArguments) {
+  // Tests that malformed arguments to connect() don't crash.
+  // Regression test for crbug.com/472700.
+  InitializeTestServer();
+  LoadChromiumConnectableExtension();
+  ui_test_utils::NavigateToURL(browser(), chromium_org_url());
+  bool result;
+  CHECK(content::ExecuteScriptAndExtractBool(
+      browser()->tab_strip_model()->GetActiveWebContents(),
+      "assertions.tryIllegalArguments()", &result));
+  EXPECT_TRUE(result);
+}
+
 IN_PROC_BROWSER_TEST_F(ExternallyConnectableMessagingTest,
                        FromIncognitoAllowExtension) {
   InitializeTestServer();
 
   scoped_refptr<const Extension> extension = LoadChromiumConnectableExtension();
 
   Browser* incognito_browser = ui_test_utils::OpenURLOffTheRecord(
       profile()->GetOffTheRecordProfile(), chromium_org_url());
   content::RenderFrameHost* incognito_frame =
       incognito_browser->tab_strip_model()
@@ skipping 295 matching lines @@
   ui_test_utils::NavigateToURL(browser(), chromium_org_url());
   EXPECT_EQ(COULD_NOT_ESTABLISH_CONNECTION_ERROR,
             CanConnectAndSendMessagesToMainFrame(invalid.get()));
 }
 
 #endif  // !defined(OS_WIN) - http://crbug.com/350517.
 
 }  // namespace
 
 };  // namespace extensions