Change how ui::Clipboard is accessed so there's only one per thread.

chrome/browser/ui/views/chrome_views_delegate.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_CHROME_VIEWS_DELEGATE_H_
 #define CHROME_BROWSER_UI_VIEWS_CHROME_VIEWS_DELEGATE_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "build/build_config.h"
 #include "ui/base/accessibility/accessibility_types.h"
 #include "ui/views/views_delegate.h"
 
 class ChromeViewsDelegate : public views::ViewsDelegate {
  public:
   ChromeViewsDelegate() {}
   virtual ~ChromeViewsDelegate() {}
 
   // Overridden from views::ViewsDelegate:
-  virtual ui::Clipboard* GetClipboard() const OVERRIDE;
   virtual void SaveWindowPlacement(const views::Widget* window,
                                    const std::string& window_name,
                                    const gfx::Rect& bounds,
                                    ui::WindowShowState show_state) OVERRIDE;
   virtual bool GetSavedWindowPlacement(
       const std::string& window_name,
       gfx::Rect* bounds,
       ui::WindowShowState* show_state) const OVERRIDE;
   virtual void NotifyAccessibilityEvent(
       views::View* view, ui::AccessibilityTypes::Event event_type) OVERRIDE;
@@ skipping 21 matching lines @@
 
   virtual content::WebContents* CreateWebContents(
       content::BrowserContext* browser_context,
       content::SiteInstance* site_instance) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ChromeViewsDelegate);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_CHROME_VIEWS_DELEGATE_H_