Cleanup Tool WebUI: Add functionality to the Scan button

chrome/browser/resources/cleanup_tool/manager.js

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 Polymer({
   is: 'cleanup-manager',
 
   properties: {
     hasScanResults: {
       type: Boolean,
@@ skipping 33 matching lines @@
   /** @override */
   created: function() {
     this.browserProxy_ = cleanup.CleanupBrowserProxyImpl.getInstance();
   },
 
   /**
    * Sends a request for Chrome to start the Cleanup Tool's scanning process.
    * @private
    */
   onScanTap_: function() {
-    // TODO implement me.
+    this.isRunningScanner = true;
+    this.browserProxy_.startScan().then(this.onScanComplete_.bind(this));
   },
 
   /**
+   * @param {LastScanResult} lastScanResults
+   */
+  onScanComplete_: function(lastScanResults) {
+    this.isRunningScanner = false;
+    this.updateLastScanState_(lastScanResults);
+  },
+
+  /**
    * Sends a request for Chrome to open the Cleanup Tool's cleanup prompt.
    * @private
    */
   onCleanupTap_: function() {
     // TODO implement me.
   },
 
   /**
    * @param {boolean} hasScanResults
    * @param {boolean} isInfected
@@ skipping 40 matching lines @@
   /**
    @param {LastScanResult} lastScanResults
   */
   updateLastScanState_: function(lastScanResults) {
     this.hasScanResults = lastScanResults.hasScanResults;
     this.isInfected = lastScanResults.hasScanResults;
     this.detectionStatusText = lastScanResults.detectionStatusText;
     this.detectionTimeText = lastScanResults.detectionTimeText;
   }
 });