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..13ef4f2fd3ffd1a743c2784c6fa2bf29cff34f6e 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 +11340,18 @@ Polymer({
 
 var SearchField = Polymer({
   is: 'cr-search-field',
-  behaviors: [CrSearchFieldBehavior]
+
+  behaviors: [CrSearchFieldBehavior],
+
+  /** @private */
+  clearSearch_: function() {
+    this.setValue('');
+  },
+
+  /** @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