Add percentage of progress in notification header.

ui/message_center/views/notification_view_md.cc

Index: ui/message_center/views/notification_view_md.cc
diff --git a/ui/message_center/views/notification_view_md.cc b/ui/message_center/views/notification_view_md.cc
index 44eeb8d4b3f3af15fdb48372568ebc389bee598a..33e0c598c247397574ce0fa2ab2896a01b4d6b80 100644
--- a/ui/message_center/views/notification_view_md.cc
+++ b/ui/message_center/views/notification_view_md.cc
@@ -6,7 +6,9 @@
 
 #include <stddef.h>
 
+#include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
+#include "base/strings/utf_string_conversions.h"
 #include "ui/base/cursor/cursor.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/canvas.h"
@@ -496,6 +498,7 @@ void NotificationViewMD::CreateOrUpdateProgressBarView(
   if (notification.type() != NOTIFICATION_TYPE_PROGRESS) {
     left_content_->RemoveChildView(progress_bar_view_);
     progress_bar_view_ = nullptr;
+    header_row_->SetSummaryText(base::string16());
     return;
   }
 
@@ -511,6 +514,9 @@ void NotificationViewMD::CreateOrUpdateProgressBarView(
 
   progress_bar_view_->SetValue(notification.progress() / 100.0);
   progress_bar_view_->SetVisible(notification.items().empty());
+
+  header_row_->SetSummaryText(base::IntToString16(notification.progress()) +

[yoshiki, 2017/06/22 13:27:37]

Could you make this a localized string?

+                              base::ASCIIToUTF16("%"));
 }
 
 void NotificationViewMD::CreateOrUpdateListItemViews(