Add mac-only "Set Up Automatic Updates..." button to the new about page.

chrome/browser/ui/webui/settings/about_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/about_handler.h"
 
 #include <stddef.h>
 
 #include <string>
 
@@ skipping 574 matching lines @@
     event->Set("connectionTypes", base::Value::CreateNullValue());
   }
 #endif  // defined(OS_CHROMEOS)
 
   CallJavascriptFunction("cr.webUIListenerCallback",
                          base::StringValue("update-status-changed"), *event);
 }
 
 #if defined(OS_MACOSX)
 void AboutHandler::SetPromotionState(VersionUpdater::PromotionState state) {
-  std::string state_str;
-  switch (state) {
-    case VersionUpdater::PROMOTE_HIDDEN:
-      state_str = "hidden";
-      break;
-    case VersionUpdater::PROMOTE_ENABLED:
-      state_str = "enabled";
-      break;
-    case VersionUpdater::PROMOTE_DISABLED:
-      state_str = "disabled";
-      break;
-  }
+  // Worth noting: PROMOTE_DISABLED indicates that promotion is possible,
+  // there's just something else going on right now (e.g. checking for update).
+  bool hidden = state == VersionUpdater::PROMOTE_HIDDEN;
+  bool disabled = state == VersionUpdater::PROMOTE_HIDDEN ||
+                  state == VersionUpdater::PROMOTE_DISABLED ||
+                  state == VersionUpdater::PROMOTED;
+  bool actionable = state == VersionUpdater::PROMOTE_DISABLED ||
+                    state == VersionUpdater::PROMOTE_ENABLED;
+
+  base::string16 text = base::string16();
+  if (actionable)
+    text = l10n_util::GetStringUTF16(IDS_ABOUT_CHROME_AUTOUPDATE_ALL);
+  else if (state == VersionUpdater::PROMOTED)
+    text = l10n_util::GetStringUTF16(IDS_ABOUT_CHROME_AUTOUPDATE_ALL_IS_ON);
+
+  base::DictionaryValue promo_state;
+  promo_state.SetBoolean("hidden", hidden);
+  promo_state.SetBoolean("disabled", disabled);
+  promo_state.SetBoolean("actionable", actionable);
+  if (!text.empty())
+    promo_state.SetString("text", text);
 
   CallJavascriptFunction("cr.webUIListenerCallback",
                          base::StringValue("promotion-state-changed"),
-                         base::StringValue(state_str));
+                         promo_state);
 }
 #endif  // defined(OS_MACOSX)
 
 #if defined(OS_CHROMEOS)
 void AboutHandler::OnRegulatoryLabelDirFound(
     std::string callback_id,
     const base::FilePath& label_dir_path) {
   if (label_dir_path.empty()) {
     ResolveJavascriptCallback(base::StringValue(callback_id),
                               *base::Value::CreateNullValue());
@@ skipping 17 matching lines @@
   regulatory_info->SetString("text", base::CollapseWhitespaceASCII(text, true));
 
   std::string image_path =
       label_dir_path.AppendASCII(kRegulatoryLabelImageFilename).MaybeAsASCII();
   std::string url =
       std::string("chrome://") + chrome::kChromeOSAssetHost + "/" + image_path;
   regulatory_info->SetString("url", url);
 
   ResolveJavascriptCallback(base::StringValue(callback_id), *regulatory_info);
 }
-
 #endif  // defined(OS_CHROMEOS)
 
 }  // namespace settings