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

chrome/browser/browser_process.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.
 
 // This interface is for managing the global services of the application. Each
 // service is lazily created when requested the first time. The service getters
 // will return NULL if the service is not available, so callers must check for
 // this condition.
 
 #ifndef CHROME_BROWSER_BROWSER_PROCESS_H_
@@ skipping 53 matching lines @@
 namespace printing {
 class BackgroundPrintingManager;
 class PrintJobManager;
 class PrintPreviewTabController;
 }
 
 namespace safe_browsing {
 class ClientSideDetectionService;
 }
 
-namespace ui {
-class Clipboard;
-}
-
 // NOT THREAD SAFE, call only from the main thread.
 // These functions shouldn't return NULL unless otherwise noted.
 class BrowserProcess {
  public:
   BrowserProcess();
   virtual ~BrowserProcess();
 
   // Called when the ResourceDispatcherHost object is created by content.
   virtual void ResourceDispatcherHostCreated() = 0;
 
   // Invoked when the user is logging out/shutting down. When logging off we may
   // not have enough time to do a normal shutdown. This method is invoked prior
   // to normal shutdown and saves any state that must be saved before we are
   // continue shutdown.
   virtual void EndSession() = 0;
 
   // Services: any of these getters may return NULL
   virtual MetricsService* metrics_service() = 0;
   virtual ProfileManager* profile_manager() = 0;
   virtual PrefService* local_state() = 0;
-  virtual ui::Clipboard* clipboard() = 0;
   virtual net::URLRequestContextGetter* system_request_context() = 0;
   virtual chrome_variations::VariationsService* variations_service() = 0;
 
 #if defined(OS_CHROMEOS)
   // Returns the out-of-memory priority manager.
   virtual chromeos::OomPriorityManager* oom_priority_manager() = 0;
 #endif  // defined(OS_CHROMEOS)
 
   virtual extensions::EventRouterForwarder*
       extension_event_router_forwarder() = 0;
@@ skipping 92 matching lines @@
 
   virtual CRLSetFetcher* crl_set_fetcher() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BrowserProcess);
 };
 
 extern BrowserProcess* g_browser_process;
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_H_