Adjust style of ARC migration successful notification.

This CL makes style changes to ARC migration successful notification.

- Add new material design icon to ARC migration successful
  notification.
- Remove old icon on the right side.
- Add title and adjust message string.

This CL corresponds with https://crrev.com/c/666597 , which makes
similar changes to ARC migration notification ("Install OS update").

TEST=manual
BUG=775818

Change-Id: If483a86e932af3a8463bd282db3d325a9984c4a2
Reviewed-on: https://chromium-review.googlesource.com/725025Reviewed-by: Yusuke Sato <yusukes@chromium.org>
Commit-Queue: Tetsui Ohkubo <tetsui@chromium.org>
Cr-Commit-Position: refs/heads/master@{#509969}

chrome/app/chromeos_strings.grdp

@@ -5152,8 +5152,11 @@ Battery full
   <message name="IDS_ARC_MIGRATE_ENCRYPTION_NOTIFICATION_RESTART_BUTTON" desc="Label for the button in the notification that navigates the user to sign-out for completing the encryption update step.">
     Sign out &amp; sign back in
   </message>
+  <message name="IDS_ARC_MIGRATE_ENCRYPTION_SUCCESS_TITLE" desc="Title of the toast shown on the first sign-in after the successfully completed migration needed for using Android apps.">
+    OS update successful
+  </message>
   <message name="IDS_ARC_MIGRATE_ENCRYPTION_SUCCESS_MESSAGE" desc="Message of the toast shown on the first sign-in after the successfully completed migration needed for using Android apps.">
-    Update successful. You can now use Android apps.
+    You can now use Android apps.
   </message>
   <message name="IDS_VOICE_INTERACTION_VALUE_PROP_LOADING" desc="Loading message of the voice interaction value prop dialog.">
     Loading Google Assistant...

chrome/browser/chromeos/arc/arc_migration_guide_notification.cc

@@ -56,16 +56,31 @@ class ArcMigrationGuideNotificationDelegate
 
 void DoShowArcMigrationSuccessNotification(
     const message_center::NotifierId& notifier_id) {
-  message_center::MessageCenter::Get()->AddNotification(
-      std::make_unique<message_center::Notification>(
-          message_center::NOTIFICATION_TYPE_SIMPLE, kSuccessNotificationId,
-          base::string16(),  // title
-          l10n_util::GetStringUTF16(IDS_ARC_MIGRATE_ENCRYPTION_SUCCESS_MESSAGE),
-          gfx::Image(gfx::CreateVectorIcon(
-              kArcMigrateEncryptionNotificationIcon, gfx::kPlaceholderColor)),
-          base::string16(), GURL(), notifier_id,
-          message_center::RichNotificationData(),
-          new message_center::NotificationDelegate()));
+  if (message_center::IsNewStyleNotificationEnabled()) {
+    message_center::MessageCenter::Get()->AddNotification(
+        message_center::Notification::CreateSystemNotification(
+            message_center::NOTIFICATION_TYPE_SIMPLE, kSuccessNotificationId,
+            l10n_util::GetStringUTF16(IDS_ARC_MIGRATE_ENCRYPTION_SUCCESS_TITLE),
+            l10n_util::GetStringUTF16(
+                IDS_ARC_MIGRATE_ENCRYPTION_SUCCESS_MESSAGE),
+            gfx::Image(), base::string16(), GURL(), notifier_id,
+            message_center::RichNotificationData(),
+            new message_center::NotificationDelegate(),
+            ash::kNotificationSettingsIcon,
+            message_center::SystemNotificationWarningLevel::NORMAL));
+  } else {
+    message_center::MessageCenter::Get()->AddNotification(
+        std::make_unique<message_center::Notification>(
+            message_center::NOTIFICATION_TYPE_SIMPLE, kSuccessNotificationId,
+            l10n_util::GetStringUTF16(IDS_ARC_MIGRATE_ENCRYPTION_SUCCESS_TITLE),
+            l10n_util::GetStringUTF16(
+                IDS_ARC_MIGRATE_ENCRYPTION_SUCCESS_MESSAGE),
+            gfx::Image(gfx::CreateVectorIcon(
+                kArcMigrateEncryptionNotificationIcon, gfx::kPlaceholderColor)),
+            base::string16(), GURL(), notifier_id,
+            message_center::RichNotificationData(),
+            new message_center::NotificationDelegate()));
+  }
 }
 
 }  // namespace