Update notification style: allow 2-line titles if the message is blank.

ui/message_center/views/notification_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/message_center/views/notification_view.h"
 
 #include "base/command_line.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "grit/ui_resources.h"
@@ skipping 305 matching lines @@
       MakeEmptyBorder(kTextTopPadding - 8, 0, kTextBottomPadding - 5, 0));
 
   const gfx::FontList default_label_font_list = views::Label().font_list();
 
   // Create the title view if appropriate.
   title_view_ = NULL;
   if (!notification.title().empty()) {
     const gfx::FontList& font_list =
         default_label_font_list.DeriveWithSizeDelta(2);
     int padding = kTitleLineHeight - font_list.GetHeight();
+    int title_lines = notification.message().empty() ? kTitleNoMessageLineLimit
+                                                     : kTitleLineLimit;
+    int title_character_limit =
+        kNotificationWidth * title_lines / kMinPixelsPerTitleCharacter;
     title_view_ = new BoundedLabel(
-        gfx::TruncateString(notification.title(), kTitleCharacterLimit),
+        gfx::TruncateString(notification.title(), title_character_limit),
         font_list);
     title_view_->SetLineHeight(kTitleLineHeight);
-    title_view_->SetLineLimit(message_center::kTitleLineLimit);
+    title_view_->SetLineLimit(title_lines);
     title_view_->SetColors(message_center::kRegularTextColor,
                            kRegularTextBackgroundColor);
     title_view_->SetBorder(MakeTextBorder(padding, 3, 0));
     top_view_->AddChildView(title_view_);
     accessible_lines.push_back(notification.title());
   }
 
   // Create the message view if appropriate.
   message_view_ = NULL;
   if (!notification.message().empty()) {
@@ skipping 263 matching lines @@
   DCHECK_GT(message_line_limit, 0);
   return message_line_limit;
 }
 
 int NotificationView::GetMessageHeight(int width, int limit) {
   return message_view_ ?
          message_view_->GetSizeForWidthAndLines(width, limit).height() : 0;
 }
 
 }  // namespace message_center