Added group policies to enable/disable importing of data from other browsers.

chrome/browser/resources/options/import_data_overlay.html

Index: chrome/browser/resources/options/import_data_overlay.html
diff --git a/chrome/browser/resources/options/import_data_overlay.html b/chrome/browser/resources/options/import_data_overlay.html
index b9e2a66b50f636308fe7228b6c31c36cac84cf74..a3be513b044f1c5910ec1296588aa73a583681c4 100644
--- a/chrome/browser/resources/options/import_data_overlay.html
+++ b/chrome/browser/resources/options/import_data_overlay.html
@@ -11,19 +11,20 @@
       <div id="import-checkboxes">
         <div i18n-content="importDescription"></div>
         <div>
-          <input id="import-history" type="checkbox">
+          <input id="import-history" type="checkbox" pref="import_history">
           <label for="import-history" i18n-content="importHistory"></label>
         </div>
         <div>
-          <input id="import-favorites" type="checkbox">
+          <input id="import-favorites" type="checkbox" pref="import_bookmarks">
           <label for="import-favorites" i18n-content="importFavorites"></label>
         </div>
         <div>
-          <input id="import-passwords" type="checkbox">
+          <input id="import-passwords" type="checkbox"
+              pref="import_saved_passwords">
           <label for="import-passwords" i18n-content="importPasswords"></label>
         </div>
         <div>
-          <input id="import-search" type="checkbox">
+          <input id="import-search" type="checkbox" pref="import_search_engine">
           <label for="import-search" i18n-content="importSearch"></label>
         </div>
       </div>