GTK: More removal of raw GtkWidget->allocation access.

chrome/browser/ui/gtk/browser_titlebar.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_titlebar.h"
 
 #include <gdk/gdkkeysyms.h>
 #include <gtk/gtk.h>
 
 #include <string>
@@ skipping 834 matching lines @@
   } else {
     GtkWidget* widget = GTK_WIDGET(window_);
     GdkScreen* screen = gtk_widget_get_screen(widget);
     gint monitor = gdk_screen_get_monitor_at_window(
         screen, gtk_widget_get_window(widget));
     GdkRectangle screen_rect;
     gdk_screen_get_monitor_geometry(screen, monitor, &screen_rect);
 
     gint x, y;
     gtk_window_get_position(window_, &x, &y);
-    gint width = widget->allocation.width;
-    gint height = widget->allocation.height;
+
+    GtkAllocation allocation;
+    gtk_widget_get_allocation(widget, &allocation);
+    gint width = allocation.width;
+    gint height = allocation.height;
 
     if (event->button.button == 3) {
       x = 0;
       width = screen_rect.width;
     } else if (event->button.button == 2) {
       y = 0;
       height = screen_rect.height;
     }
 
     browser_window_->SetBounds(gfx::Rect(x, y, width, height));
@@ skipping 270 matching lines @@
     ui::SimpleMenuModel::Delegate* delegate)
     : SimpleMenuModel(delegate) {
   AddItemWithStringId(IDC_NEW_TAB, IDS_TAB_CXMENU_NEWTAB);
   AddItemWithStringId(IDC_RESTORE_TAB, IDS_RESTORE_TAB);
   AddSeparator();
   AddItemWithStringId(IDC_TASK_MANAGER, IDS_TASK_MANAGER);
   AddSeparator();
   AddCheckItemWithStringId(kShowWindowDecorationsCommand,
                            IDS_SHOW_WINDOW_DECORATIONS_MENU);
 }