Add 5 experimental accessibility features on Chrome OS.

chrome/browser/ui/webui/settings/chromeos/a11y_handler.cc

+// Copyright 2016 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/settings/chromeos/a11y_handler.h"
+
+#include "base/bind.h"
+#include "base/command_line.h"
+#include "base/values.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chromeos/chromeos_switches.h"
+#include "content/public/browser/web_ui.h"
+
+namespace chromeos {
+namespace settings {
+
+A11yHandler::A11yHandler(content::WebUI* webui)
+    : profile_(Profile::FromWebUI(webui)) {
+}
+
+A11yHandler::~A11yHandler() {
+}
+
+void A11yHandler::RegisterMessages() {
+  web_ui()->RegisterMessageCallback(
+      "initializeAccessibilityPage",
+      base::Bind(&A11yHandler::HandleInitialize,
+                 base::Unretained(this)));
+}
+
+void A11yHandler::HandleInitialize(const base::ListValue* args) {
+  const base::FundamentalValue show_experimental_features(
+      base::CommandLine::ForCurrentProcess()->HasSwitch(
+          chromeos::switches::kEnableExperimentalAccessibilityFeatures));

[Dan Beam, 2016/03/11 22:07:20]

can you just push this value into loadTimeData instead?

+  web_ui()->CallJavascriptFunction(
+      "cr.webUIListenerCallback",
+      base::StringValue("show-experimental-features"),
+      show_experimental_features);
+}
+
+}  // namespace settings
+}  // namespace chromeos