Add delay to didAssociateFormControlsTimer so it doesn't fire too frequently

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 <tuple>
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/macros.h"
 #include "base/strings/stringprintf.h"
@@ skipping 115 matching lines @@
       "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();
 
+  WaitForAutofillDidAssociateFormControl();
   message = render_thread_->sink().GetFirstMessageMatching(
       AutofillHostMsg_FormsSeen::ID);
   ASSERT_NE(nullptr, message);
   AutofillHostMsg_FormsSeen::Read(message, &params);
   forms = std::get<0>(params);
   ASSERT_EQ(1UL, forms.size());
   ASSERT_EQ(3UL, forms[0].fields.size());
 
   expected.form_control_type = "text";
   expected.max_length = WebInputElement::defaultMaxLength();
@@ skipping 56 matching lines @@
   ASSERT_NE(nullptr, message);
   AutofillHostMsg_FormsSeen::Param params;
   AutofillHostMsg_FormsSeen::Read(message, &params);
   std::vector<FormData> forms = std::get<0>(params);
   ASSERT_EQ(1UL, forms.size());
   ASSERT_EQ(7UL, forms[0].fields.size());
 
   render_thread_->sink().ClearMessages();
 
   ExecuteJavaScriptForTests("AddFields()");
-  msg_loop_.RunUntilIdle();
 
+  WaitForAutofillDidAssociateFormControl();
   message = render_thread_->sink().GetFirstMessageMatching(
       AutofillHostMsg_FormsSeen::ID);
   ASSERT_NE(nullptr, message);
   AutofillHostMsg_FormsSeen::Read(message, &params);
   forms = std::get<0>(params);
   ASSERT_EQ(1UL, forms.size());
   ASSERT_EQ(9UL, forms[0].fields.size());
 
   FormFieldData expected;
 
@@ skipping 30 matching lines @@
                          AutofillHostMsg_TextFieldDidChange::ID));
 
   // A user gesture will send a message to the browser.
   EnableUserGestureSimulationForAutofill();
   SimulateUserInputChangeForElement(&full_name, "Alice");
   ASSERT_NE(nullptr, render_thread_->sink().GetFirstMessageMatching(
                          AutofillHostMsg_TextFieldDidChange::ID));
 }
 
 }  // namespace autofill