Change ash no notofication message size and color

ash/system/web_notification/web_notification_tray.cc

Index: ash/system/web_notification/web_notification_tray.cc
diff --git a/ash/system/web_notification/web_notification_tray.cc b/ash/system/web_notification/web_notification_tray.cc
index a9e439e9dcf77d01e6e0a9556d7d2b4891835bc8..a99b80879b95cb48d64dafc0936cd4cf67ccf641 100644
--- a/ash/system/web_notification/web_notification_tray.cc
+++ b/ash/system/web_notification/web_notification_tray.cc
@@ -607,8 +607,9 @@ class MessageCenterContentsView : public WebContentsView {
     if (num_children == 0) {
       views::Label* label = new views::Label(l10n_util::GetStringUTF16(
           IDS_ASH_WEB_NOTFICATION_TRAY_NO_MESSAGES));
-      label->SetFont(label->font().DeriveFont(2));
+      label->SetFont(label->font().DeriveFont(1));
       label->SetHorizontalAlignment(views::Label::ALIGN_CENTER);
+      label->SetEnabledColor(SK_ColorGRAY);
       scroll_content_->AddChildView(label);
       button_view_->SetCloseAllVisible(false);
     } else {