MD Settings: Associate suppages with the controls that trigger them.

chrome/browser/resources/settings/settings_page/settings_subpage.js

Index: chrome/browser/resources/settings/settings_page/settings_subpage.js
diff --git a/chrome/browser/resources/settings/settings_page/settings_subpage.js b/chrome/browser/resources/settings/settings_page/settings_subpage.js
index 07aeaee853883a7fddd9b6f4052254ccab8cc4c5..37151824358587e3c14e6c64e74851b32346e8dc 100644
--- a/chrome/browser/resources/settings/settings_page/settings_subpage.js
+++ b/chrome/browser/resources/settings/settings_page/settings_subpage.js
@@ -29,6 +29,22 @@ Polymer({
       notify: true,
       value: '',
     },
+
+    /** @type {?HTMLElement} */
+    associatedControl: {
+      type: Object,
+      value: null,
+    },
+
+    /**
+     * Indicates whether an associated control (an element that triggers the
+     * subpage) is not registered for this page. Used by the searching algorithm
+     * to show search bubbles.
+     */
+    noAssociatedControl: {
+      type: Boolean,
+      value: false,
+    },
   },
 
   /** @private */