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

chrome/test/base/testing_browser_process.h

Index: chrome/test/base/testing_browser_process.h
diff --git a/chrome/test/base/testing_browser_process.h b/chrome/test/base/testing_browser_process.h
index e5c573b9f5dff5cb33c615aa3691d14672c0fdc0..8fc19908f0d9e362407aa0b9fe563c9d2e29f86a 100644
--- a/chrome/test/base/testing_browser_process.h
+++ b/chrome/test/base/testing_browser_process.h
@@ -38,10 +38,6 @@ namespace prerender {
 class PrerenderTracker;
 }
 
-namespace ui {
-class Clipboard;
-}
-
 class TestingBrowserProcess : public BrowserProcess {
  public:
   TestingBrowserProcess();
@@ -70,7 +66,6 @@ class TestingBrowserProcess : public BrowserProcess {
   virtual chromeos::OomPriorityManager* oom_priority_manager() OVERRIDE;
 #endif  // defined(OS_CHROMEOS)
 
-  virtual ui::Clipboard* clipboard() OVERRIDE;
   virtual extensions::EventRouterForwarder*
       extension_event_router_forwarder() OVERRIDE;
   virtual NotificationUIManager* notification_ui_manager() OVERRIDE;
@@ -115,7 +110,6 @@ class TestingBrowserProcess : public BrowserProcess {
  private:
   scoped_ptr<content::NotificationService> notification_service_;
   unsigned int module_ref_count_;
-  scoped_ptr<ui::Clipboard> clipboard_;
   std::string app_locale_;
 
   // Weak pointer.