Update the alignment of the chrome://apps theme attribution when theme is installed

chrome/browser/resources/ntp4/new_tab_theme.css

 /* 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. */
 
 html {
   background-attachment: fixed;
   background-color: ${colorBackground};
   background-image: url(chrome://theme/IDR_THEME_NTP_BACKGROUND?${themeId});
   background-position: ${backgroundBarDetached};
   background-repeat: ${backgroundTiling};
 }
 
+#attribution {
+  left: ${leftAlignAttribution};
+  right: ${rightAlignAttribution};
+  text-align: ${textAlignAttribution};
+}
+
 #attribution-img {
   content: url(chrome://theme/IDR_THEME_NTP_ATTRIBUTION?${themeId});
 }
 
 html[bookmarkbarattached='true'] {
   background-position: ${backgroundBarAttached};
 }
 
 body {
   color: ${colorTextRgba};
@@ skipping 49 matching lines @@
 }
 
 .thumbnail-wrapper {
   /* This shows through at the (rounded) thumbnail's corners. */
   background-color: ${colorSectionBorder};
 }
 
 .filler .thumbnail {
   border-color: ${colorBackground};
 }