Show data usage on Site Details (MDSettings)

chrome/browser/ui/webui/settings/site_settings_handler.h

Index: chrome/browser/ui/webui/settings/site_settings_handler.h
diff --git a/chrome/browser/ui/webui/settings/site_settings_handler.h b/chrome/browser/ui/webui/settings/site_settings_handler.h
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+// 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.
+
+#ifndef CHROME_BROWSER_UI_WEBUI_SETTINGS_SITE_SETTINGS_HANDLER_H_
+#define CHROME_BROWSER_UI_WEBUI_SETTINGS_SITE_SETTINGS_HANDLER_H_
+
+#include <vector>
+
+#include "chrome/browser/storage/storage_info_fetcher.h"
+#include "chrome/browser/ui/webui/settings/md_settings_ui.h"
+
+class Profile;
+
+namespace base {
+class Value;
+}
+
+namespace settings {
+
+// Chrome "ContentSettings" settings page UI handler.
+class SiteSettingsHandler
+     : public SettingsPageUIHandler, StorageInfoFetcher::Observer {
+ public:
+  explicit SiteSettingsHandler(Profile* profile);
+  ~SiteSettingsHandler() override;
+
+  // SettingsPageUIHandler:
+  void RegisterMessages() override;
+
+  // StorageInfoFetcher::Observer:
+  void OnGetUsageInfo(const storage::UsageInfoEntries& entries) override;
+
+ private:
+  // Asynchronusly fetches the usage for a given origin. Replies back with
+  // OnGetUsageInfo above.
+  void HandleFetchUsageTotal(const base::ListValue* args);
+
+  Profile* profile_;
+
+  // The host for which to fetch usage.
+  std::string usage_host_;
+
+  // The helper object asynchronously fetching storage info.
+  scoped_refptr<StorageInfoFetcher> storage_info_fetcher_;
+
+  DISALLOW_COPY_AND_ASSIGN(SiteSettingsHandler);
+};
+
+}  // namespace settings
+
+#endif  // CHROME_BROWSER_UI_WEBUI_SETTINGS_SITE_SETTINGS_HANDLER_H_