It is time.

ui/native_theme/common_theme.h

-// 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.
-
-#ifndef UI_NATIVE_THEME_COMMON_THEME_H_
-#define UI_NATIVE_THEME_COMMON_THEME_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "ui/native_theme/native_theme.h"
-
-class SkCanvas;
-
-namespace gfx {
-class Canvas;
-}
-
-namespace ui {
-
-// Drawing code that is common for all platforms.
-
-// Returns true and |color| if |color_id| is found, or false otherwise.
-bool NATIVE_THEME_EXPORT CommonThemeGetSystemColor(
-    NativeTheme::ColorId color_id,
-    SkColor* color);
-
-gfx::Size NATIVE_THEME_EXPORT CommonThemeGetPartSize(
-    NativeTheme::Part part,
-    NativeTheme::State state,
-    const NativeTheme::ExtraParams& extra);
-
-void NATIVE_THEME_EXPORT CommonThemePaintComboboxArrow(
-    SkCanvas* canvas,
-    const gfx::Rect& rect);
-
-void NATIVE_THEME_EXPORT CommonThemePaintMenuSeparator(
-    SkCanvas* canvas,
-    const gfx::Rect& rect,
-    const NativeTheme::MenuSeparatorExtraParams& extra);
-
-void NATIVE_THEME_EXPORT CommonThemePaintMenuGutter(SkCanvas* canvas,
-                                                    const gfx::Rect& rect);
-
-void NATIVE_THEME_EXPORT CommonThemePaintMenuBackground(SkCanvas* canvas,
-                                                        const gfx::Rect& rect);
-
-void NATIVE_THEME_EXPORT CommonThemePaintMenuItemBackground(
-    SkCanvas* canvas,
-    NativeTheme::State state,
-    const gfx::Rect& rect);
-
-// Creates a gfx::Canvas wrapping an SkCanvas.
-scoped_ptr<gfx::Canvas> NATIVE_THEME_EXPORT CommonThemeCreateCanvas(
-    SkCanvas* sk_canvas);
-
-}  // namespace ui
-
-#endif  // UI_NATIVE_THEME_COMMON_THEME_H_