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

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 5e54b6b0b979a58373cdafd67f9d876f3fa59467..038c1f4f3dbc7021d7509f911dc231ea90dbe4b9 100644
--- a/chrome/renderer/autofill/autofill_renderer_browsertest.cc
+++ b/chrome/renderer/autofill/autofill_renderer_browsertest.cc
@@ -136,6 +136,7 @@ TEST_F(AutofillRendererTest, SendForms) {
       "document.body.appendChild(newForm);");
   msg_loop_.RunUntilIdle();
 
+  WaitForAutofillDidAssociateFormControl();
   message = render_thread_->sink().GetFirstMessageMatching(
       AutofillHostMsg_FormsSeen::ID);
   ASSERT_NE(nullptr, message);
@@ -214,8 +215,10 @@ TEST_F(AutofillRendererTest, DynamicallyAddedUnownedFormElements) {
   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);