Fixed ugly text in the material design system menu.

ash/common/system/chromeos/tray_tracing.cc

Index: ash/common/system/chromeos/tray_tracing.cc
diff --git a/ash/common/system/chromeos/tray_tracing.cc b/ash/common/system/chromeos/tray_tracing.cc
index 99d915defe5a4ea273d010ebb474148944e9fac3..a016421ef7936f2e724cb8a460254eabfd5a2042 100644
--- a/ash/common/system/chromeos/tray_tracing.cc
+++ b/ash/common/system/chromeos/tray_tracing.cc
@@ -13,6 +13,7 @@
 #include "ash/common/system/tray/system_tray_notifier.h"
 #include "ash/common/system/tray/tray_constants.h"
 #include "ash/common/system/tray/tray_popup_item_style.h"
+#include "ash/common/system/tray/tray_popup_utils.h"
 #include "ash/common/wm_shell.h"
 #include "grit/ash_resources.h"
 #include "grit/ash_strings.h"
@@ -44,9 +45,8 @@ class DefaultTracingView : public ActionableView {
     }
     AddChildView(image_);
 
-    label_ = new views::Label();
+    label_ = TrayPopupUtils::CreateDefaultLabel();
     label_->SetMultiLine(true);
-    label_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
     label_->SetText(bundle.GetLocalizedString(IDS_ASH_STATUS_TRAY_TRACING));
     AddChildView(label_);