Support maximize window command.

chrome/browser/ui/gtk/browser_window_gtk.cc

 // 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.
 
 #include "chrome/browser/ui/gtk/browser_window_gtk.h"
 
 #include <dlfcn.h>
 #include <gdk/gdkkeysyms.h>
 
 #include <algorithm>
@@ skipping 1597 matching lines @@
     } else {
       fullscreen_exit_bubble_type_ =
           FEB_TYPE_BROWSER_FULLSCREEN_EXIT_INSTRUCTION;
       gtk_widget_show(titlebar_widget());
       fullscreen_exit_bubble_.reset();
       UpdateCustomFrame();
       ShowSupportedWindowFeatures();
     }
   }
 
+  if (event->changed_mask & GDK_WINDOW_STATE_MAXIMIZED) {
+    content::NotificationService::current()->Notify(
+        chrome::NOTIFICATION_BROWSER_WINDOW_MAXIMIZED,
+        content::Source<BrowserWindow>(this),
+        content::NotificationService::NoDetails());
+  }
+
   titlebar_->UpdateCustomFrame(UseCustomFrame() && !IsFullscreen());
   UpdateWindowShape(bounds_.width(), bounds_.height());
   SaveWindowPosition();
   return FALSE;
 }
 
 // Callback for the delete event.  This event is fired when the user tries to
 // close the window (e.g., clicking on the X in the window manager title bar).
 gboolean BrowserWindowGtk::OnMainWindowDeleteEvent(GtkWidget* widget,
                                                    GdkEvent* event) {
@@ skipping 973 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;
 }