Fix the form autofill showing when pressing the up arrow key

webkit/glue/editor_client_impl.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef WEBKIT_GLUE_EDITOR_CLIENT_IMPL_H__
 #define WEBKIT_GLUE_EDITOR_CLIENT_IMPL_H__
 
 #include <deque>
 
 #include "DOMWindow.h"
@@ skipping 100 matching lines @@
                                        WebCore::ExceptionCode ec);
   virtual std::wstring Describe(WebCore::Range* range);
   virtual std::wstring Describe(WebCore::Node* node);
   virtual std::wstring Describe(WebCore::EditorInsertAction action);
   virtual std::wstring Describe(WebCore::EAffinity affinity);
   virtual std::wstring Describe(WebCore::CSSStyleDeclaration* style);
 
   // Shows the autofill popup for |node| if it is an HTMLInputElement and it is
   // empty.  This is called when you press the up or down arrow in a text field
   // or when clicking an already focused text-field.
-  virtual void ShowAutofillForNode(WebCore::Node* node);
+  // Returns true if the autofill popup has been scheduled to be shown, false
+  // otherwise.
+  virtual bool ShowAutofillForNode(WebCore::Node* node);
 
  private:
   void ModifySelection(WebCore::Frame* frame,
                        WebCore::KeyboardEvent* event);
 
   // Popups an autofill menu for |input_element| is applicable.
   // |autofill_on_empty_value| indicates whether the autofill should be shown
   // when the text-field is empty.
-  void Autofill(WebCore::HTMLInputElement* input_element,
+  // Returns true if the autofill popup has been scheduled to be shown, false
+  // otherwise.
+  bool Autofill(WebCore::HTMLInputElement* input_element,
                 bool autofill_on_empty_value);
 
   // This method is invoked later by Autofill() as when Autofill() is invoked
   // (from one of the EditorClient callback) the carret position is not
   // reflecting the last text change yet and we need it to decide whether or not
   // to show the autofill popup.
   void DoAutofill(WebCore::HTMLInputElement* input_element,
                   bool autofill_on_empty_value,
                   bool backspace);
 
@@ skipping 26 matching lines @@
     SPELLCHECK_FORCED_ON,
     SPELLCHECK_FORCED_OFF
   };
   int spell_check_this_field_status_;
 
   // The method factory used to post autofill related tasks.
   ScopedRunnableMethodFactory<EditorClientImpl> autofill_factory_;
 };
 
 #endif  // WEBKIT_GLUE_EDITOR_CLIENT_IMPL_H__