Requery the autofill server when forms and input fields are dynamically added.

chrome/renderer/autofill/autofill_renderer_browsertest.cc

Index: chrome/renderer/autofill/autofill_renderer_browsertest.cc
diff --git a/chrome/renderer/autofill/autofill_renderer_browsertest.cc b/chrome/renderer/autofill/autofill_renderer_browsertest.cc
index c09c4c2b164e05ec10336ccda428e5801dad0da7..3f9bddc240f31ab5b513e9deb80952701e0209c7 100644
--- a/chrome/renderer/autofill/autofill_renderer_browsertest.cc
+++ b/chrome/renderer/autofill/autofill_renderer_browsertest.cc
@@ -125,6 +125,61 @@ TEST_F(ChromeRenderViewTest, SendForms) {
   EXPECT_FORM_FIELD_DATA_EQUALS(expected, form2.fields[2]);
 }
 
+TEST_F(ChromeRenderViewTest, SendDynamicForms) {
+  // Don't want any delay for form state sync changes. This will still post a
+  // message so updates will get coalesced, but as soon as we spin the message
+  // loop, it will generate an update.
+  SendContentStateImmediately();
+
+  LoadHTML("<form method=\"POST\" id=\"testform\">"
+           "  <input type=\"text\" id=\"firstname\"/>"
+           "  <input type=\"text\" id=\"middlename\"/>"
+           "  <input type=\"text\" id=\"lastname\" autoComplete=\"off\"/>"
+           "  <input type=\"hidden\" id=\"email\"/>"
+           "  <select id=\"state\"/>"
+           "    <option>?</option>"
+           "    <option>California</option>"
+           "    <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;
+  ASSERT_EQ(1UL, forms.size());
+  ASSERT_EQ(4UL, forms[0].fields.size());
+
+  autofill_agent_->OnWhitelistedForAutocheckout();
+  render_thread_->sink().ClearMessages();
+  ExecuteJavaScript("var newInput=document.createElement(\"input\");"
+                    "newInput.setAttribute(\"type\",\"text\");"
+                    "newInput.setAttribute(\"id\", \"telephone\");"
+                    "document.getElementById(\"testform\")"
+                    ".appendChild(newInput);");
+  msg_loop_.RunUntilIdle();
+
+  // Verify that FormsSeen is present with the new field.
+  const IPC::Message* message2 = render_thread_->sink().GetFirstMessageMatching(
+      AutofillHostMsg_FormsSeen::ID);
+  ASSERT_NE(static_cast<IPC::Message*>(NULL), message2);
+  AutofillHostMsg_FormsSeen::Read(message2, &params);
+  const std::vector<FormData>& new_forms = params.a;
+  ASSERT_EQ(1UL, new_forms.size());
+  ASSERT_EQ(5UL, new_forms[0].fields.size());
+
+  FormFieldData expected;
+
+  expected.name = ASCIIToUTF16("telephone");
+  expected.value = string16();
+  expected.form_control_type = "text";
+  expected.max_length = WebInputElement::defaultMaxLength();
+  EXPECT_FORM_FIELD_DATA_EQUALS(expected, forms[0].fields[4]);
+}
+
 TEST_F(ChromeRenderViewTest, FillFormElement) {
   // Don't want any delay for form state sync changes. This will still post a
   // message so updates will get coalesced, but as soon as we spin the message