Add percentage of progress in notification header.

ui/message_center/views/notification_view_md.cc

 // Copyright 2017 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_md.h"
 
 #include <stddef.h>
 
 #include "base/strings/string_util.h"
 #include "ui/base/cursor/cursor.h"
@@ skipping 533 matching lines @@
   compact_title_message_view_->set_title(notification.title());
   compact_title_message_view_->set_message(notification.message());
   left_content_->InvalidateLayout();
 }
 
 void NotificationViewMD::CreateOrUpdateProgressBarView(
     const Notification& notification) {
   if (notification.type() != NOTIFICATION_TYPE_PROGRESS) {
     left_content_->RemoveChildView(progress_bar_view_);
     progress_bar_view_ = nullptr;
+    header_row_->ClearProgress();
     return;
   }
 
   DCHECK(left_content_);
 
   if (!progress_bar_view_) {
     progress_bar_view_ = new views::ProgressBar(kProgressBarHeight,
                                                 /* allow_round_corner */ false);
     progress_bar_view_->SetBorder(views::CreateEmptyBorder(
         message_center::kProgressBarTopPadding, 0, 0, 0));
     left_content_->AddChildView(progress_bar_view_);
   }
 
   progress_bar_view_->SetValue(notification.progress() / 100.0);
   progress_bar_view_->SetVisible(notification.items().empty());
+
+  header_row_->SetProgress(notification.progress());
 }
 
 void NotificationViewMD::CreateOrUpdateListItemViews(
     const Notification& notification) {
   for (auto* item_view : item_views_)
     delete item_view;
   item_views_.clear();
 
   const std::vector<NotificationItem>& items = notification.items();
 
@@ skipping 194 matching lines @@
                                   header_row_->expand_button()->HasFocus()) ||
                                  (header_row_->IsCloseButtonEnabled() &&
                                   header_row_->close_button()->HasFocus()) ||
                                  (header_row_->IsSettingsButtonEnabled() &&
                                   header_row_->settings_button()->HasFocus());
 
   header_row_->SetControlButtonsVisible(target_visibility);
 }
 
 }  // namespace message_center