Set multi-line attribute on the label before call SizeToFit to avoid DCHECK-ing.

ash/system/chromeos/label_tray_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 "ash/system/chromeos/label_tray_view.h"
 
 #include "ash/system/tray/hover_highlight_view.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ash/system/tray/view_click_listener.h"
 #include "ui/base/resource/resource_bundle.h"
@@ skipping 32 matching lines @@
 views::View* LabelTrayView::CreateChildView(
     const base::string16& message) const {
   HoverHighlightView* child = new HoverHighlightView(click_listener_);
   if (icon_resource_id_) {
     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
     const gfx::ImageSkia* icon = rb.GetImageSkiaNamed(icon_resource_id_);
     child->AddIconAndLabel(*icon, message, gfx::Font::NORMAL);
     child->set_border(
         views::Border::CreateEmptyBorder(0, kTrayPopupPaddingHorizontal,
                                          0, kTrayPopupPaddingHorizontal));
+    child->text_label()->SetMultiLine(true);
     child->text_label()->SizeToFit(kTrayNotificationContentsWidth);
   } else {
     child->AddLabel(message, gfx::Font::NORMAL);
+    child->text_label()->SetMultiLine(true);
     child->text_label()->SizeToFit(kTrayNotificationContentsWidth +
                                    kNotificationIconWidth);
   }
-  child->text_label()->SetMultiLine(true);
   child->text_label()->SetAllowCharacterBreak(true);
   child->SetExpandable(true);
   child->SetVisible(true);
   return child;
 }
 
 }  // namespace internal
 }  // namespace ash