Add percentage of progress in notification header.

ui/message_center/views/notification_header_view.cc

Index: ui/message_center/views/notification_header_view.cc
diff --git a/ui/message_center/views/notification_header_view.cc b/ui/message_center/views/notification_header_view.cc
index 97cdd3615e5f54a81311eeb736c30e2a68671d70..18f58871514efdcc6fa2bd085d8eb5c835ff295f 100644
--- a/ui/message_center/views/notification_header_view.cc
+++ b/ui/message_center/views/notification_header_view.cc
@@ -62,6 +62,21 @@ NotificationHeaderView::NotificationHeaderView(views::ButtonListener* listener)
   app_name_view_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
   app_info_container->AddChildView(app_name_view_);
 
+  // Summary text divider
+  summary_text_divider_ = new views::Label(l10n_util::GetStringUTF16(
+      IDS_MESSAGE_CENTER_NOTIFICATION_HEADER_DIVIDER_SYMBOL_WITH_SPACES));
+  summary_text_divider_->SetFontList(font_list);
+  summary_text_divider_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
+  summary_text_divider_->SetVisible(false);
+  app_info_container->AddChildView(summary_text_divider_);
+
+  // Summary text view
+  summary_text_view_ = new views::Label(base::string16());
+  summary_text_view_->SetFontList(font_list);
+  summary_text_view_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
+  summary_text_view_->SetVisible(false);
+  app_info_container->AddChildView(summary_text_view_);
+
   // Expand button view
   expand_button_ = new views::ImageButton(listener);
   expand_button_->SetImage(
@@ -106,6 +121,18 @@ void NotificationHeaderView::SetAppName(const base::string16& name) {
   app_name_view_->SetText(name);
 }
 
+void NotificationHeaderView::SetSummaryText(
+    const base::string16& summary_text) {
+  if (summary_text.empty()) {
+    summary_text_divider_->SetVisible(false);
+    summary_text_view_->SetVisible(false);
+  } else {
+    summary_text_view_->SetText(summary_text);
+    summary_text_divider_->SetVisible(true);
+    summary_text_view_->SetVisible(true);
+  }
+}
+
 void NotificationHeaderView::SetExpandButtonEnabled(bool enabled) {
   expand_button_->SetVisible(enabled);
 }