Fix autofill test data.

The discussion at [1] gives some background on the root cause of the failure.

[1] https://codereview.chromium.org/610493002/

BUG=323093

Review URL: https://codereview.chromium.org/657253003

Cr-Commit-Position: refs/heads/master@{#299965}

chrome/browser/autofill/form_structure_browsertest.cc

@@ -250,9 +250,8 @@ IN_PROC_BROWSER_TEST_F(FormStructureBrowserTest,
                     kFileNamePattern);
 }
 
-// This test has real failures. http://crbug.com/323093
 IN_PROC_BROWSER_TEST_F(FormStructureBrowserTest,
-    DISABLED_DataDrivenHeuristics16) {
+    MAYBE_DataDrivenHeuristics(16)) {
   const base::FilePath::CharType kFileNamePattern[] =
       FILE_PATH_LITERAL("16_*.html");
   RunDataDrivenTest(GetInputDirectory(kTestName),

chrome/test/data/autofill/heuristics/input/16_crbug_98286.html

-<!-- https://www.jbox.com/checkout/payment# -->
+<!-- https://www.jcpenney.com/dotcom/jsp/checkout/secure/checkout.jsp -->
 <form name="frmAddCreditCard" method="post" action="#" id="frmAddCreditCard">
   <div>
     <!-- Display bread crumb -->