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

chrome/browser/ui/panels/panel.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/panels/panel.h"
 
 #include "base/logging.h"
 #include "chrome/browser/extensions/extension_prefs.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 238 matching lines @@
 
 bool Panel::IsMaximized() const {
   // Size of panels is managed by PanelManager, they are never 'zoomed'.
   return false;
 }
 
 bool Panel::IsMinimized() const {
   return expansion_state_ != EXPANDED;
 }
 
+void Panel::Maximize() {
+  Restore();
+}
+
+void Panel::Minimize() {
+  SetExpansionState(MINIMIZED);
+}
+
+void Panel::Restore() {
+  SetExpansionState(EXPANDED);
+}
+
 void Panel::EnterFullscreen(
       const GURL& url, FullscreenExitBubbleType type) {
   NOTIMPLEMENTED();
 }
 
 void Panel::ExitFullscreen() {
   NOTIMPLEMENTED();
 }
 
 void Panel::UpdateFullscreenExitBubbleContent(
@@ skipping 325 matching lines @@
     RequestRenderViewHostToDisableScrollbars(render_view_host);
 }
 
 Browser* Panel::browser() const {
   return native_panel_->GetPanelBrowser();
 }
 
 void Panel::DestroyBrowser() {
   native_panel_->DestroyPanelBrowser();
 }