[Autofill] Disable AutofillInteractiveTest.DynamicFormFill on ChromeOS.

chrome/browser/autofill/autofill_interactive_uitest.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 <string>
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ skipping 1154 matching lines @@
            " <option value=\"US\">United States</option>"
            " </select><br>"
            "<label for=\"phone\">Phone number:</label>"
            " <input type=\"text\" id=\"phone\"><br>"
            "</form>")));
 
   // Invoke Autofill.
   TryBasicFormFill();
 }
 
+// Flakily fails on ChromeOS (crbug.com/646576).
+#if defined(OS_CHROMEOS)
+#define MAYBE_DynamicFormFill DISABLED_DynamicFormFill
+#else
+#define MAYBE_DynamicFormFill DynamicFormFill
+#endif
 // Test that we can Autofill dynamically generated forms.
-IN_PROC_BROWSER_TEST_F(AutofillInteractiveTest, DynamicFormFill) {
+IN_PROC_BROWSER_TEST_F(AutofillInteractiveTest, MAYBE_DynamicFormFill) {
   CreateTestProfile();
 
   // Load the test page.
   ASSERT_NO_FATAL_FAILURE(ui_test_utils::NavigateToURL(browser(),
       GURL(std::string(kDataURIPrefix) +
            "<form id=\"form\" action=\"http://www.example.com/\""
            "      method=\"POST\"></form>"
            "<script>"
            "function AddElement(name, label) {"
            "  var form = document.getElementById('form');"
@@ skipping 528 matching lines @@
   ASSERT_NO_FATAL_FAILURE(ui_test_utils::NavigateToURL(browser(),
       GURL(std::string(kDataURIPrefix) + kTestPasswordFormString)));
   ASSERT_TRUE(content::ExecuteScript(
       GetRenderViewHost(),
       "document.getElementById('user').value = 'user';"));
   FocusFieldByName("password");
   PasteStringAndWait("foobar");
 }
 
 }  // namespace autofill