F6 should do tabbing between frames. The current behaviour differs from IE/Sa...

chrome/browser/autocomplete/autocomplete_edit.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 CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_H_
 #define CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_H_
 
 #include <atlbase.h>
 #include <atlapp.h>
 #include <atlcrack.h>
@@ skipping 506 matching lines @@
   // Sets the window text and the caret position.
   void SetWindowTextAndCaretPos(const std::wstring& text, size_t caret_pos);
 
   // Returns true if all text is selected.
   bool IsSelectAll();
 
   // Selects all the text in the edit.  Use this in place of SetSelAll() to
   // avoid selecting the "phantom newline" at the end of the edit.
   void SelectAll(bool reversed);
 
+  // Deselects all the text in the edit.
+  void DeSelectAll();
+
   // Reverts the edit and popup back to their unedited state (permanent text
   // showing, popup closed, no user input in progress).
   void RevertAll();
 
   // Updates the autocomplete popup and other state after the text has been
   // changed by the user.
   void UpdatePopup();
 
   // Closes the autocomplete popup, if it's open.
   void ClosePopup();
@@ skipping 379 matching lines @@
       : model_state(model_state),
         view_state(view_state) {
   }
 
   const AutocompleteEditModel::State model_state;
   const AutocompleteEditView::State view_state;
 };
 
 #endif  // CHROME_BROWSER_AUTOCOMPLETE_AUTOCOMPLETE_EDIT_H_