Add extension API to change window show state using chrome.windows.update().

chrome/browser/ui/gtk/browser_window_gtk.h

 // Copyright (c) 2011 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_GTK_BROWSER_WINDOW_GTK_H_
 #define CHROME_BROWSER_UI_GTK_BROWSER_WINDOW_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
@@ skipping 72 matching lines @@
   virtual void UpdateTitleBar();
   virtual void BookmarkBarStateChanged(
       BookmarkBar::AnimateChangeType change_type);
   virtual void UpdateDevTools();
   virtual void UpdateLoadingAnimations(bool should_animate);
   virtual void SetStarredState(bool is_starred);
   virtual gfx::Rect GetRestoredBounds() const;
   virtual gfx::Rect GetBounds() const;
   virtual bool IsMaximized() const;
   virtual bool IsMinimized() const;
+  virtual void Maximize() OVERRIDE;
+  virtual void Minimize() OVERRIDE;
+  virtual void Restore() OVERRIDE;
   virtual void EnterFullscreen(
       const GURL& url, FullscreenExitBubbleType type) OVERRIDE;
   virtual void ExitFullscreen() OVERRIDE;
   virtual void UpdateFullscreenExitBubbleContent(
       const GURL& url,
       FullscreenExitBubbleType bubble_type) OVERRIDE;
   virtual bool IsFullscreen() const;
   virtual bool IsFullscreenBubbleVisible() const;
   virtual LocationBar* GetLocationBar() const;
   virtual void SetFocusToLocationBar(bool select_all);
@@ skipping 418 matching lines @@
   // be called. This should only be enabled in tests where the debounce timeout
   // introduces timing issues (e.g. in OmniBoxApiTest it dismisses the
   // autocomplete popup before the results can be read) and the final window
   // position is unimportant.
   bool debounce_timer_disabled_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserWindowGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_BROWSER_WINDOW_GTK_H_