Fix problems correctly invalidating/repainting when our updated paint rect fo...

chrome/browser/renderer_host/render_widget_host_view_gtk.h

 // Copyright (c) 2006-2009 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 CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_GTK_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_GTK_H_
 
 #include <gdk/gdk.h>
 #include <vector>
 
@@ skipping 83 matching lines @@
   GtkWidget* parent_;
   // We connect to the parent's focus out event. When we are destroyed, we need
   // to remove this handler, so we must keep track of its id.
   gulong popup_signal_id_;
   // This variable determines our degree of control over user input. If we are
   // activatable, we must grab and handle all user input. If we are not
   // activatable, then our parent render view retains more control. Example of
   // activatable popup: <select> dropdown. Example of non-activatable popup:
   // form autocomplete.
   bool activatable_;
+  // This is true when we are currently painting and thus should handle extra
+  // paint requests by expanding the invalid rect rather than actually
+  // painting.
+  bool about_to_validate_and_paint_;
+  // This is the rectangle which we'll paint.
+  gfx::Rect invalid_rect_;
 
   // Whether we are currently loading.
   bool is_loading_;
 
   // The cursor for the page. This is passed up from the renderer.
   WebCursor current_cursor_;
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_GTK_H_