MD WebUI: Remove local DOM access from CrSearchFieldBehavior

ui/webui/resources/cr_elements/cr_toolbar/cr_toolbar_search_field.js

Index: ui/webui/resources/cr_elements/cr_toolbar/cr_toolbar_search_field.js
diff --git a/ui/webui/resources/cr_elements/cr_toolbar/cr_toolbar_search_field.js b/ui/webui/resources/cr_elements/cr_toolbar/cr_toolbar_search_field.js
index 69f7d8efea827e83b99f64137e49376f762c4da0..86fe5aa484f39a69dfe6a572f107f1f75136a63c 100644
--- a/ui/webui/resources/cr_elements/cr_toolbar/cr_toolbar_search_field.js
+++ b/ui/webui/resources/cr_elements/cr_toolbar/cr_toolbar_search_field.js
@@ -36,6 +36,16 @@ Polymer({
     'searchInput.bind-value-changed': 'onBindValueChanged_',
   },
 
+  /** @return {!HTMLInputElement} */
+  getSearchInput: function() {
+    return this.$.searchInput;
+  },
+
+  /** @return {boolean} */
+  isSearchFocused: function() {
+    return this.$.searchTerm.focused;
+  },
+
   /**
    * @param {boolean} narrow
    * @return {number}