Cleanup Tool WebUI: Add HTML content and styling with dummy JS

chrome/browser/ui/webui/cleanup_tool/cleanup_action_handler.cc

+// 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.
+
+#include "chrome/browser/ui/webui/cleanup_tool/cleanup_action_handler.h"
+
+#include "base/bind.h"
+#include "base/values.h"
+#include "chrome/grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+
+CleanupActionHandler::CleanupActionHandler() {}
+
+void CleanupActionHandler::RegisterMessages() {
+  web_ui()->RegisterMessageCallback(
+      "requestLastScanResult",
+      base::Bind(&CleanupActionHandler::HandleRequestLastScanResult,
+                 base::Unretained(this)));
+}
+
+void CleanupActionHandler::HandleRequestLastScanResult(
+    const base::ListValue* args) {
+  // TODO(proberge): Return real information about the last run.
+  // TODO(proberge): Localize strings once they are finalized.
+  web_ui()->CallJavascriptFunctionUnsafe("cleanup.Manager.setDetectionStatus",
+                                         base::Value(false), base::Value(false),
+                                         base::Value("No problems detected"),
+                                         base::Value("Last scanned today"));
+}