Don't dismiss Autofill suggestions when clicking on a field that currently has a popup open.

chrome/renderer/autofill/autofill_agent.cc

 // Copyright (c) 2011 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 "chrome/renderer/autofill/autofill_agent.h"
 
 #include "base/message_loop.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/common/autofill_messages.h"
 #include "chrome/common/chrome_constants.h"
@@ skipping 292 matching lines @@
   }
   autofill_action_ = AUTOFILL_NONE;
   Send(new AutofillHostMsg_DidFillAutofillFormData(routing_id()));
 }
 
 void AutofillAgent::ShowSuggestions(const WebInputElement& element,
                                     bool autofill_on_empty_values,
                                     bool requires_caret_at_end,
                                     bool display_warning_if_disabled) {
   if (!element.isEnabled() || element.isReadOnly() || !element.autoComplete() ||
-      !element.isTextField() || element.isPasswordField())
+      !element.isTextField() || element.isPasswordField() ||
+      !element.suggestedValue().isEmpty())
     return;
 
   // If the field has no name, then we won't have values.
   if (element.nameForAutofill().isEmpty())
     return;
 
   // Don't attempt to autofill with values that are too large.
   WebString value = element.value();
   if (value.length() > kMaximumTextSizeForAutofill)
     return;
@@ skipping 71 matching lines @@
   // WebFormControlElementToFormField does not scrape the DOM for the field
   // label, so find the label here.
   // TODO(jhawkins): Add form and field identities so we can use the cached form
   // data in FormManager.
   field->label = FormManager::LabelForElement(element);
 
   return true;
 }
 
 }  // namespace autofill