Revert of MD Settings: Stop using prefs to populate import data dialog.

chrome/browser/resources/settings/people_page/import_data_dialog.js

Index: chrome/browser/resources/settings/people_page/import_data_dialog.js
diff --git a/chrome/browser/resources/settings/people_page/import_data_dialog.js b/chrome/browser/resources/settings/people_page/import_data_dialog.js
index a63b30832a1f07de064042c502f2b0934e2f7b10..6e0f1c2c0004de8d222fe9ec01188f69b0b09fe7 100644
--- a/chrome/browser/resources/settings/people_page/import_data_dialog.js
+++ b/chrome/browser/resources/settings/people_page/import_data_dialog.js
@@ -9,7 +9,7 @@
 Polymer({
   is: 'settings-import-data-dialog',
 
-  behaviors: [I18nBehavior, WebUIListenerBehavior],
+  behaviors: [I18nBehavior, WebUIListenerBehavior, PrefsBehavior],
 
   properties: {
     /** @private {!Array<!settings.BrowserProfile>} */
@@ -41,10 +41,11 @@
       type: Object,
       value: settings.ImportDataStatus,
     },
+  },
 
-    /** @private */
-    showBookmarkSuccess_: Boolean,
-  },
+  observers: [
+    'prefsChanged_(selected_, prefs.*)',
+  ],
 
   /** @private {?settings.ImportDataBrowserProxy} */
   browserProxy_: null,
@@ -68,24 +69,22 @@
         /** @param {settings.ImportDataStatus} importStatus */
         function(importStatus) {
           this.importStatus_ = importStatus;
-          if (this.hasImportStatus_(settings.ImportDataStatus.SUCCEEDED)) {
-            this.showBookmarkSuccess_ =
-                this.$.favorites.checked && this.selected_.favorites;
-          }
-
           if (this.hasImportStatus_(settings.ImportDataStatus.FAILED))
             this.closeDialog_();
         }.bind(this));
   },
 
   /** @private */
-  onCheckboxChange_: function() {
+  prefsChanged_: function() {
     this.noImportDataTypeSelected_ =
-        !(this.selected_.history && this.$.history.checked) &&
-        !(this.selected_.favorites && this.$.favorites.checked) &&
-        !(this.selected_.passwords && this.$.passwords.checked) &&
-        !(this.selected_.search && this.$.search.checked) &&
-        !(this.selected_.autofillFormData && this.$.autofillFormData.checked);
+        !(this.getPref('import_history').value && this.selected_.history) &&
+        !(this.getPref('import_bookmarks').value && this.selected_.favorites) &&
+        !(this.getPref('import_saved_passwords').value &&
+            this.selected_.passwords) &&
+        !(this.getPref('import_search_engine').value &&
+            this.selected_.search) &&
+        !(this.getPref('import_autofill_form_data').value &&
+            this.selected_.autofillFormData);
   },
 
   /**
@@ -116,7 +115,6 @@
   /** @private */
   onBrowserProfileSelectionChange_: function() {
     this.selected_ = this.browserProfiles_[this.$.browserSelect.selectedIndex];
-    this.onCheckboxChange_();
   },
 
   /** @private */