views/examples: Remove unused |browser_context_| variable.

ui/views/examples/examples_window.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/examples_window.h"
 
 #include <string>
 
 #include "base/memory/scoped_vector.h"
 #include "base/utf_string_conversions.h"
@@ skipping 166 matching lines @@
     combobox_model_.AddExample(new TreeViewExample);
     combobox_model_.AddExample(new WidgetExample);
   }
 
   static ExamplesWindowContents* instance_;
   ComboboxModelExampleList combobox_model_;
   Combobox* combobox_;
   View* example_shown_;
   Label* status_label_;
   const Operation operation_;
-  content::BrowserContext* browser_context_;
 
   DISALLOW_COPY_AND_ASSIGN(ExamplesWindowContents);
 };
 
 // static
 ExamplesWindowContents* ExamplesWindowContents::instance_ = NULL;
 
 void ShowExamplesWindow(Operation operation) {
   if (ExamplesWindowContents::instance()) {
     ExamplesWindowContents::instance()->GetWidget()->Activate();
   } else {
     Widget::CreateWindowWithBounds(new ExamplesWindowContents(operation),
                                    gfx::Rect(0, 0, 850, 300))->Show();
   }
 }
 
 void LogStatus(const std::string& string) {
   ExamplesWindowContents::instance()->SetStatus(string);
 }
 
 }  // namespace examples
 }  // namespace views