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

chrome/browser/ui/gtk/browser_window_gtk.cc

 // 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.
 
 #include "chrome/browser/ui/gtk/browser_window_gtk.h"
 
 #include <gdk/gdkkeysyms.h>
 
 #include <dlfcn.h>
 #include <string>
@@ skipping 827 matching lines @@
 }
 
 bool BrowserWindowGtk::IsMaximized() const {
   return (state_ & GDK_WINDOW_STATE_MAXIMIZED);
 }
 
 bool BrowserWindowGtk::IsMinimized() const {
   return (state_ & GDK_WINDOW_STATE_ICONIFIED);
 }
 
+void BrowserWindowGtk::Maximize() {
+  gtk_window_maximize(window_);
+}
+
+void BrowserWindowGtk::Minimize() {
+  gtk_window_iconify(window_);
+}
+
+void BrowserWindowGtk::Restore() {
+  if (IsMaximized())
+    UnMaximize();
+  else if (IsMinimized())
+    gtk_window_deiconify(window_);
+}
+
 bool BrowserWindowGtk::ShouldDrawContentDropShadow() {
   return !IsMaximized() && UseCustomFrame();
 }
 
 void BrowserWindowGtk::EnterFullscreen(
       const GURL& url, FullscreenExitBubbleType type) {
   // gtk_window_(un)fullscreen asks the window manager to toggle the EWMH
   // for fullscreen windows.  Not all window managers support this.
   gtk_window_fullscreen(window_);
   bool is_kiosk =
@@ skipping 1548 matching lines @@
           wm_type == ui::WM_OPENBOX ||
           wm_type == ui::WM_XFWM4);
 }
 
 // static
 BrowserWindow* BrowserWindow::CreateBrowserWindow(Browser* browser) {
   BrowserWindowGtk* browser_window_gtk = new BrowserWindowGtk(browser);
   browser_window_gtk->Init();
   return browser_window_gtk;
 }