Cleanup Tool WebUI: Add browser_proxy javascript class

chrome/browser/resources/cleanup_tool/cleanup_browser_proxy.js

Index: chrome/browser/resources/cleanup_tool/cleanup_browser_proxy.js
diff --git a/chrome/browser/resources/cleanup_tool/cleanup_browser_proxy.js b/chrome/browser/resources/cleanup_tool/cleanup_browser_proxy.js
new file mode 100644
index 0000000000000000000000000000000000000000..9d5d71133eac97b3c6366c7661de9789f06659a1
--- /dev/null
+++ b/chrome/browser/resources/cleanup_tool/cleanup_browser_proxy.js
@@ -0,0 +1,53 @@
+// 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.
+
+/**
+ * @fileoverview Helper object and related behavior that encapsulate messaging
+ * between JS and C++ for interacting with the Chrome Cleanup Tool.
+ */
+
+/**
+ * @typedef {{
+ *   hasScanResults: boolean Whether there are existing scan results.
+ *   isInfected: boolean Whether the last scan found a program that the Chrome
+ *       Cleanup Tool can remove,

[Fabio Tirelo, 2017/03/30 19:25:45]

Nit: period at the end of each item?

+ *   detectionStatusText: string A pluralized and localized string summarizing
+ *       the scan results,
+ *   detectionTimeText: string A pluralized and localized string summarizing
+ *       when the last scan took place
+ * }};
+ */
+var LastScanResult;
+
+cr.define('cleanup', function() {
+  /** @interface */
+  function CleanupBrowserProxy() {}
+
+  CleanupBrowserProxy.prototype = {
+    /**
+     * Fetch the result of the latest Chrome Cleanup Tool scanning task.
+     * @return {!Promise<LastScanResult>}
+     */
+    requestLastScanResult: function() {},
+  };
+
+  /**
+   * @constructor
+   * @implements {cleanup.CleanupBrowserProxy}
+   */
+  function CleanupBrowserProxyImpl() {}
+  cr.addSingletonGetter(CleanupBrowserProxyImpl);
+
+  CleanupBrowserProxyImpl.prototype = {
+    /** @override */
+    requestLastScanResult: function() {
+      return cr.sendWithPromise('requestLastScanResult');
+    },
+  };
+
+  return {
+    CleanupBrowserProxy: CleanupBrowserProxy,
+    CleanupBrowserProxyImpl: CleanupBrowserProxyImpl,
+  }
+});