Support painting panels with chromium themes on GTK.

chrome/browser/ui/panels/native_panel.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 CHROME_BROWSER_UI_PANELS_NATIVE_PANEL_H_
 #define CHROME_BROWSER_UI_PANELS_NATIVE_PANEL_H_
 #pragma once
 
 #include "chrome/browser/ui/panels/panel.h"
 #include "ui/gfx/native_widget_types.h"
@@ skipping 59 matching lines @@
 
   // Returns the exterior size of the panel window given the client content
   // size and vice versa.
   virtual gfx::Size WindowSizeFromContentSize(
       const gfx::Size& content_size) const = 0;
   virtual gfx::Size ContentSizeFromWindowSize(
       const gfx::Size& window_size) const = 0;
 
   virtual int TitleOnlyHeight() const = 0;
 
-  // Returns the size of the iconified panel. This is the size we use to draw
-  // the panel put in the overflow area.
-  virtual gfx::Size IconOnlySize() const = 0;
-
   // Brings the panel to the top of the z-order without activating it. This
   // will make sure that the panel is not obscured by other top-most windows.
   virtual void EnsurePanelFullyVisible() = 0;
 
   // Sets whether the panel app icon is visible (usually refers to the app icons
   // in the desktop bar).
   virtual void SetPanelAppIconVisibility(bool visible) = 0;
 
   // Sets whether the panel window is always on top.
   virtual void SetPanelAlwaysOnTop(bool on_top) = 0;
@@ skipping 38 matching lines @@
   // active, i.e. the titlebar is painted per its active state.
   virtual bool VerifyActiveState(bool is_active) = 0;
   virtual void WaitForWindowCreationToComplete() const { }
 
   virtual bool IsWindowSizeKnown() const = 0;
   virtual bool IsAnimatingBounds() const = 0;
   virtual bool IsButtonVisible(TitlebarButtonType button_type) const = 0;
 };
 
 #endif  // CHROME_BROWSER_UI_PANELS_NATIVE_PANEL_H_