[Autofill] Enable Autofill for dynamically created forms.

chrome/renderer/autofill/autofill_renderer_browsertest.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/command_line.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/test/base/chrome_render_view_test.h"
 #include "components/autofill/content/common/autofill_messages.h"
 #include "components/autofill/content/renderer/autofill_agent.h"
@@ skipping 61 matching lines @@
            "    <option>Texas</option>"
            "  </select>"
            "</form>");
 
   // Verify that "FormsSeen" sends the expected number of fields.
   const IPC::Message* message = render_thread_->sink().GetFirstMessageMatching(
       AutofillHostMsg_FormsSeen::ID);
   ASSERT_NE(static_cast<IPC::Message*>(NULL), message);
   AutofillHostMsg_FormsSeen::Param params;
   AutofillHostMsg_FormsSeen::Read(message, &params);
-  const std::vector<FormData>& forms = params.a;
+  std::vector<FormData> forms = params.a;
   ASSERT_EQ(1UL, forms.size());
   ASSERT_EQ(4UL, forms[0].fields.size());
 
   FormFieldData expected;
 
   expected.name = ASCIIToUTF16("firstname");
   expected.value = base::string16();
   expected.form_control_type = "text";
   expected.max_length = WebInputElement::defaultMaxLength();
   EXPECT_FORM_FIELD_DATA_EQUALS(expected, forms[0].fields[0]);
@@ skipping 10 matching lines @@
   expected.autocomplete_attribute = "off";
   expected.max_length = WebInputElement::defaultMaxLength();
   EXPECT_FORM_FIELD_DATA_EQUALS(expected, forms[0].fields[2]);
   expected.autocomplete_attribute = std::string();  // reset
 
   expected.name = ASCIIToUTF16("state");
   expected.value = ASCIIToUTF16("?");
   expected.form_control_type = "select-one";
   expected.max_length = 0;
   EXPECT_FORM_FIELD_DATA_EQUALS(expected, forms[0].fields[3]);
+
+  render_thread_->sink().ClearMessages();
+
+  // Dynamically create a new form. A new message should be sent for it, but
+  // not for the previous form.
+  ExecuteJavaScript(
+      "var newForm=document.createElement('form');"
+      "newForm.id='new_testform';"
+      "newForm.action='http://google.com';"
+      "newForm.method='post';"
+      "var newFirstname=document.createElement('input');"
+      "newFirstname.setAttribute('type', 'text');"
+      "newFirstname.setAttribute('id', 'second_firstname');"
+      "newFirstname.value = 'Bob';"
+      "var newLastname=document.createElement('input');"
+      "newLastname.setAttribute('type', 'text');"
+      "newLastname.setAttribute('id', 'second_lastname');"
+      "newLastname.value = 'Hope';"
+      "var newEmail=document.createElement('input');"
+      "newEmail.setAttribute('type', 'text');"
+      "newEmail.setAttribute('id', 'second_email');"
+      "newEmail.value = 'bobhope@example.com';"
+      "newForm.appendChild(newFirstname);"
+      "newForm.appendChild(newLastname);"
+      "newForm.appendChild(newEmail);"
+      "document.body.appendChild(newForm);");
+  msg_loop_.RunUntilIdle();
+
+  message = render_thread_->sink().GetFirstMessageMatching(
+      AutofillHostMsg_FormsSeen::ID);
+  ASSERT_NE(static_cast<IPC::Message*>(NULL), message);
+  AutofillHostMsg_FormsSeen::Read(message, &params);
+  forms = params.a;
+  ASSERT_EQ(1UL, forms.size());
+  ASSERT_EQ(3UL, forms[0].fields.size());
+
+  expected.form_control_type = "text";
+  expected.max_length = WebInputElement::defaultMaxLength();
+
+  expected.name = ASCIIToUTF16("second_firstname");
+  expected.value = ASCIIToUTF16("Bob");
+  EXPECT_FORM_FIELD_DATA_EQUALS(expected, forms[0].fields[0]);
+
+  expected.name = ASCIIToUTF16("second_lastname");
+  expected.value = ASCIIToUTF16("Hope");
+  EXPECT_FORM_FIELD_DATA_EQUALS(expected, forms[0].fields[1]);
+
+  expected.name = ASCIIToUTF16("second_email");
+  expected.value = ASCIIToUTF16("bobhope@example.com");
+  EXPECT_FORM_FIELD_DATA_EQUALS(expected, forms[0].fields[2]);
 }
 
 TEST_F(AutofillRendererTest, EnsureNoFormSeenIfTooFewFields) {
   LoadHTML("<form method=\"POST\">"
            "  <input type=\"text\" id=\"firstname\"/>"
            "  <input type=\"text\" id=\"middlename\"/>"
            "</form>");
 
   // Verify that "FormsSeen" isn't sent, as there are too few fields.
   const IPC::Message* message = render_thread_->sink().GetFirstMessageMatching(
@@ skipping 185 matching lines @@
 
 TEST_F(RequestAutocompleteRendererTest, InvokingTwiceOnlyShowsOnce) {
   // Attempting to show the requestAutocomplete dialog again should be ignored.
   autofill_agent_->didRequestAutocomplete(invoking_form(),
                                           blink::WebAutocompleteParams());
   EXPECT_FALSE(render_thread_->sink().GetFirstMessageMatching(
       AutofillHostMsg_RequestAutocomplete::ID));
 }
 
 }  // namespace autofill