MD WebUI: rework how clearing search works

chrome/browser/resources/md_downloads/crisper.js

Index: chrome/browser/resources/md_downloads/crisper.js
diff --git a/chrome/browser/resources/md_downloads/crisper.js b/chrome/browser/resources/md_downloads/crisper.js
index cf866b173dead07a10bcffa6d8412737181847c5..1c2434ba3936cfa6c36d8f9da33a014204f219e6 100644
--- a/chrome/browser/resources/md_downloads/crisper.js
+++ b/chrome/browser/resources/md_downloads/crisper.js
@@ -10568,11 +10568,6 @@ var CrSearchFieldBehavior = {
     this.$.searchInput.blur();
   },
 
-  /** @private */
-  toggleShowingSearch_: function() {
-    this.showingSearch = !this.showingSearch;
-  },
-
   /** @return {boolean} */
   isSearchFocused: function() {
     return this.$.searchTerm.focused;
@@ -11345,7 +11340,25 @@ Polymer({
 
 var SearchField = Polymer({
   is: 'cr-search-field',
-  behaviors: [CrSearchFieldBehavior]
+
+  behaviors: [CrSearchFieldBehavior],
+
+  properties: {
+    value_: {
+      type: String,
+    },
+  },
+
+  /** @private */
+  clearSearch_: function() {
+    this.setValue('');
+    this.$.searchInput.focus();
+  },
+
+  /** @private */
+  toggleShowingSearch_: function() {
+    this.showingSearch = !this.showingSearch;
+  },
 });
 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be