no native implementation of Textfield.

views/controls/textfield/textfield.cc

 // Copyright (c) 2010 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 "views/controls/textfield/textfield.h"
 
 #if defined(OS_LINUX)
 #include <gdk/gdkkeysyms.h>
 #endif
 
@@ skipping 340 matching lines @@
 }
 
 std::string Textfield::GetClassName() const {
   return kViewClassName;
 }
 
 app::KeyboardCode Textfield::Keystroke::GetKeyboardCode() const {
 #if defined(OS_WIN)
   return static_cast<app::KeyboardCode>(key_);
 #else
-  return static_cast<app::KeyboardCode>(
-      app::WindowsKeyCodeForGdkKeyCode(event_.keyval));
+  return event_->GetKeyCode();
 #endif
 }
 
 #if defined(OS_WIN)
 bool Textfield::Keystroke::IsControlHeld() const {
   return win_util::IsCtrlPressed();
 }
 
 bool Textfield::Keystroke::IsShiftHeld() const {
   return win_util::IsShiftPressed();
 }
 #else
 bool Textfield::Keystroke::IsControlHeld() const {
-  return (event_.state & gtk_accelerator_get_default_mod_mask()) ==
-      GDK_CONTROL_MASK;
+  return event_->IsControlDown();
 }
 
 bool Textfield::Keystroke::IsShiftHeld() const {
-  return (event_.state & gtk_accelerator_get_default_mod_mask()) ==
-      GDK_SHIFT_MASK;
+  return event_->IsShiftDown();
 }
 #endif
 
 }  // namespace views