Make sure sideload wipeout doesn't interfere with the tests.

chrome/browser/ui/views/extensions/disabled_extensions_view.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_EXTENSIONS_DISABLED_EXTENSIONS_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_EXTENSIONS_DISABLED_EXTENSIONS_VIEW_H_
 
 #include "ui/views/bubble/bubble_delegate.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/link_listener.h"
@@ skipping 13 matching lines @@
 class DisabledExtensionsView : public views::BubbleDelegateView,
                                public views::ButtonListener,
                                public views::LinkListener {
  public:
   DisabledExtensionsView(views::View* anchor_view,
                          Browser* browser,
                          const ExtensionSet* wiped_out);
 
   // Show the Disabled Extension bubble, if needed. Returns true if the bubble
   // was shown.
-  static bool MaybeShow(Browser* browser, views::View* anchor_view);
+  static void MaybeShow(Browser* browser, views::View* anchor_view);
 
  protected:
   // views::BubbleDelegateView overrides:
   virtual void Init() OVERRIDE;
 
  private:
   virtual ~DisabledExtensionsView();
 
+  // Makes sure the bubble is not shown again.
+  void DontShowBubbleAgain();
+
   // views::ButtonListener implementation.
   virtual void ButtonPressed(views::Button* sender,
                              const ui::Event& event) OVERRIDE;
 
   // views::LinkListener implementation.
   virtual void LinkClicked(views::Link* source, int event_flags) OVERRIDE;
 
   // views::View implementation.
   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
   virtual void ViewHierarchyChanged(bool is_add,
                                     View* parent,
                                     View* child) OVERRIDE;
 
   Browser* browser_;
 
   // The set of extensions that have been wiped out by sideload wipeout.
   scoped_ptr<const ExtensionSet> wiped_out_;
 
   // The headline and buttons on the bubble.
   views::Label* headline_;
   views::Link* learn_more_;
   views::NativeTextButton* settings_button_;
   views::NativeTextButton* dismiss_button_;
 
   DISALLOW_COPY_AND_ASSIGN(DisabledExtensionsView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_EXTENSIONS_DISABLED_EXTENSIONS_VIEW_H_