Wait showing html dialog until renderer finish painting after page is loaded.

views/widget/native_widget_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 VIEWS_WIDGET_NATIVE_WIDGET_GTK_H_
 #define VIEWS_WIDGET_NATIVE_WIDGET_GTK_H_
 #pragma once
 
 #include <gtk/gtk.h>
 
@@ skipping 90 matching lines @@
   // Sets the drop target to NULL. This is invoked by DropTargetGTK when the
   // drop is done.
   void ResetDropTarget();
 
   // Gets the requested size of the widget.  This can be the size
   // stored in properties for a GtkViewsFixed, or in the requisitioned
   // size of other kinds of widgets.
   void GetRequestedSize(gfx::Size* out) const;
 
   // Overridden from ui::ActiveWindowWatcherX::Observer.
-  virtual void ActiveWindowChanged(GdkWindow* active_window);
+  virtual void ActiveWindowChanged(GdkWindow* active_window) OVERRIDE;
 
   // Clears the focus on the native widget having the focus.
   virtual void ClearNativeFocus();
 
   // Handles a keyboard event by sending it to our focus manager.
   // Returns true if it's handled by the focus manager.
   bool HandleKeyboardEvent(const KeyEvent& key);
 
+  // Tells widget not to remove FREEZE_UPDATES property when the
+  // widget is painted.  This is used if painting the gtk widget
+  // is not enough to show the window and has to wait further like
+  // keyboard overlay. Returns true if this is called before
+  // FREEZE_UPDATES property is removed, or false otherwise.
+  bool SuppressFreezeUpdates();
+
   // Enables debug painting. See |debug_paint_enabled_| for details.
   static void EnableDebugPaint();
 
   // Sets and deletes FREEZE_UPDATES property on given |window|.
   // It adds the property when |enable| is true and remove if false.
   // Calling this method will realize the window if it's not realized yet.
   // This property is used to help WindowManager know when the window
   // is fully painted so that WM can map the fully painted window.
   // The property is based on Owen Taylor's proposal at
   // http://mail.gnome.org/archives/wm-spec-list/2009-June/msg00002.html.
@@ skipping 309 matching lines @@
   bool painted_;
 
   scoped_ptr<InputMethod> input_method_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeWidgetGtk);
 };
 
 }  // namespace views
 
 #endif  // VIEWS_WIDGET_NATIVE_WIDGET_GTK_H_