Try 2 - Change how ui::Clipboard is accessed so there's only one per thread.

ui/views/controls/message_box_view.cc

 // 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.
 
 #include "ui/views/controls/message_box_view.h"
 
 #include "base/i18n/rtl.h"
 #include "base/message_loop.h"
 #include "base/string_split.h"
 #include "base/utf_string_conversions.h"
 #include "ui/base/accessibility/accessible_view_state.h"
 #include "ui/base/clipboard/clipboard.h"
 #include "ui/base/clipboard/scoped_clipboard_writer.h"
 #include "ui/views/controls/button/checkbox.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/controls/textfield/textfield.h"
 #include "ui/views/layout/grid_layout.h"
 #include "ui/views/layout/layout_constants.h"
-#include "ui/views/views_delegate.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/window/client_view.h"
 
 namespace {
 
 const int kDefaultMessageWidth = 320;
 
 // Paragraph separators are defined in
 // http://www.unicode.org/Public/6.0.0/ucd/extracted/DerivedBidiClass.txt
 //
@@ skipping 102 matching lines @@
 }
 
 bool MessageBoxView::AcceleratorPressed(const ui::Accelerator& accelerator) {
   // We only accepts Ctrl-C.
   DCHECK(accelerator.key_code() == 'C' && accelerator.IsCtrlDown());
 
   // We must not intercept Ctrl-C when we have a text box and it's focused.
   if (prompt_field_ && prompt_field_->HasFocus())
     return false;
 
-  if (!ViewsDelegate::views_delegate)
-    return false;
-
-  ui::Clipboard* clipboard = ViewsDelegate::views_delegate->GetClipboard();
+  ui::Clipboard* clipboard = ui::Clipboard::GetForCurrentThread();
   if (!clipboard)
     return false;
 
   ui::ScopedClipboardWriter scw(clipboard, ui::Clipboard::BUFFER_STANDARD);
   string16 text = message_labels_[0]->text();
   for (size_t i = 1; i < message_labels_.size(); ++i)
     text += message_labels_[i]->text();
   scw.WriteText(text);
   return true;
 }
@@ skipping 104 matching lines @@
   if (checkbox_) {
     layout->AddPaddingRow(0, kRelatedControlVerticalSpacing);
     layout->StartRow(0, checkbox_column_view_set_id);
     layout->AddView(checkbox_);
   }
 
   layout->AddPaddingRow(0, kRelatedControlVerticalSpacing);
 }
 
 }  // namespace views