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

ui/views/test/test_views_delegate.cc

Index: ui/views/test/test_views_delegate.cc
diff --git a/ui/views/test/test_views_delegate.cc b/ui/views/test/test_views_delegate.cc
index 2ae2aa44ff1276f0ceed099a5a033b5d0c554d62..e87f18da243edcccd9c700cd4d592631723df2b6 100644
--- a/ui/views/test/test_views_delegate.cc
+++ b/ui/views/test/test_views_delegate.cc
@@ -6,7 +6,6 @@
 
 #include "base/logging.h"
 #include "content/public/test/web_contents_tester.h"
-#include "ui/base/clipboard/clipboard.h"
 
 namespace views {
 
@@ -24,14 +23,6 @@ void TestViewsDelegate::SetUseTransparentWindows(bool transparent) {
   use_transparent_windows_ = transparent;
 }
 
-ui::Clipboard* TestViewsDelegate::GetClipboard() const {
-  if (!clipboard_.get()) {
-    // Note that we need a MessageLoop for the next call to work.
-    clipboard_.reset(new ui::Clipboard);
-  }
-  return clipboard_.get();
-}
-
 void TestViewsDelegate::SaveWindowPlacement(const Widget* window,
                                             const std::string& window_name,
                                             const gfx::Rect& bounds,