Cleanup: remove GTK stuff

ui/views/controls/textfield/textfield.cc

 // Copyright (c) 2012 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 "ui/views/controls/textfield/textfield.h"
 
 #include <string>
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 357 matching lines @@
   // We don't translate accelerators for ALT + NumPad digit on Windows, they are
   // used for entering special characters.  We do translate alt-home.
   if (e.IsAltDown() && (key != ui::VKEY_HOME) &&
       NativeTextfieldWin::IsNumPadDigit(key,
                                         (e.flags() & ui::EF_EXTENDED) != 0))
     return true;
 #endif
   return false;
 }
 
-void Textfield::OnPaintBackground(gfx::Canvas* canvas) {
-  // Overridden to be public - gtk_views_entry.cc wants to call it.
-  View::OnPaintBackground(canvas);
-}
-
 void Textfield::OnPaintFocusBorder(gfx::Canvas* canvas) {
   if (NativeViewHost::kRenderNativeControlFocus)
     View::OnPaintFocusBorder(canvas);
 }
 
 bool Textfield::OnKeyPressed(const views::KeyEvent& e) {
   return native_wrapper_ && native_wrapper_->HandleKeyPressed(e);
 }
 
 bool Textfield::OnKeyReleased(const views::KeyEvent& e) {
@@ skipping 53 matching lines @@
     native_wrapper_ = NativeTextfieldWrapper::CreateWrapper(this);
     AddChildView(native_wrapper_->GetView());
     // TODO(beng): Move this initialization to NativeTextfieldWin once it
     //             subclasses NativeControlWin.
     UpdateAllProperties();
 
 #if defined(OS_WIN) && !defined(USE_AURA)
     if (!views::Widget::IsPureViews()) {
       // TODO(beng): remove this once NativeTextfieldWin subclasses
       // NativeControlWin. This is currently called to perform post-AddChildView
-      // initialization for the wrapper. The GTK version subclasses things
-      // correctly and doesn't need this.
+      // initialization for the wrapper.
       //
       // Remove the include for native_textfield_win.h above when you fix this.
       static_cast<NativeTextfieldWin*>(native_wrapper_)->AttachHack();
     }
 #endif
   }
 }
 
 std::string Textfield::GetClassName() const {
   return kViewClassName;
 }
 
 }  // namespace views