[MD WebUI] Move icons used in Bookmarks and Settings to shared file.

chrome/browser/resources/settings/people_page/people_page.html

Index: chrome/browser/resources/settings/people_page/people_page.html
diff --git a/chrome/browser/resources/settings/people_page/people_page.html b/chrome/browser/resources/settings/people_page/people_page.html
index d9b0d40947765e1e40dd95344c5e139249ff7e31..19ad887adb2b28c1c4bbea7a192f83de3790970f 100644
--- a/chrome/browser/resources/settings/people_page/people_page.html
+++ b/chrome/browser/resources/settings/people_page/people_page.html
@@ -54,11 +54,11 @@
         font-weight: bold;
       }
 
-      iron-icon[icon='settings:sync'] {
+      iron-icon[icon='cr:sync'] {
        --iron-icon-fill-color: var(--google-green-700);
       }
 
-      #sync-status[actionable] iron-icon[icon='settings:sync-problem'] {
+      #sync-status[actionable] iron-icon[icon='cr:sync-problem'] {
        --iron-icon-fill-color: var(--settings-error-color);
       }