Fix crash when closing table example.

ui/views/examples/table_example.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 "ui/views/examples/table_example.h"
 
 #include <vector>
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/views/controls/button/checkbox.h"
 #include "ui/views/layout/grid_layout.h"
 
 namespace views {
 namespace examples {
 
-TableExample::TableExample() : ExampleBase("Table") {
+TableExample::TableExample() : ExampleBase("Table") , table_(NULL) {
 }
 
 TableExample::~TableExample() {
   // Delete the view before the model.
   delete table_;
   table_ = NULL;
 }
 
 void TableExample::CreateExampleView(View* container) {
 #if defined(OS_WIN) && !defined(USE_AURA)
@@ skipping 122 matching lines @@
   } else if (sender == column4_visible_checkbox_) {
     index = 3;
     show = column4_visible_checkbox_->checked();
   }
   table_->SetColumnVisibility(index, show);
 #endif
 }
 
 }  // namespace examples
 }  // namespace views