Implement RemovableDeviceNotifications for Mac

chrome/browser/system_monitor/removable_device_notifications_mac.h

Index: chrome/browser/system_monitor/removable_device_notifications_mac.h
diff --git a/chrome/browser/system_monitor/removable_device_notifications_mac.h b/chrome/browser/system_monitor/removable_device_notifications_mac.h
new file mode 100644
index 0000000000000000000000000000000000000000..0f975381e84684cadb92851e4b8a45b25f8bb9e2
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+++ b/chrome/browser/system_monitor/removable_device_notifications_mac.h
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+// Copyright (c) 2012 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_SYSTEM_MONITOR_REMOVABLE_DEVICE_NOTIFICATIONS_MAC_H_
+#define CHROME_BROWSER_SYSTEM_MONITOR_REMOVABLE_DEVICE_NOTIFICATIONS_MAC_H_
+
+#include <DiskArbitration/DiskArbitration.h>
+#include <map>
+
+#include "base/mac/scoped_cftyperef.h"
+#include "base/memory/weak_ptr.h"
+#include "chrome/browser/system_monitor/disk_info_mac.h"
+
+namespace chrome {
+
+// This class posts notifications to base::SystemMonitor when a new disk
+// is attached, removed, or changed.
+class RemovableDeviceNotificationsMac :
+    public base::SupportsWeakPtr<RemovableDeviceNotificationsMac> {
+ public:
+  enum UpdateAction {
+    UPDATE_SHOULD_REMOVE,
+    UPDATE_SHOULD_NOT_REMOVE,
+  };
+
+  RemovableDeviceNotificationsMac();
+  virtual ~RemovableDeviceNotificationsMac();
+
+  void UpdateDisk(const DiskInfoMac& info, UpdateAction update_action);
+
+ private:
+  static void DiskAppearedCallback(DADiskRef disk, void* context);
+  static void DiskDisappearedCallback(DADiskRef disk, void* context);
+  static void DiskDescriptionChangedCallback(DADiskRef disk,
+                                             CFArrayRef keys,
+                                             void *context);
+
+  bool ShouldPostNotificationForDisk(const DiskInfoMac& info) const;
+
+  base::mac::ScopedCFTypeRef<DASessionRef> session_;
+  // Maps disk bsd names to disk info objects. This map tracks all mountable
+  // devices on the system though only notifications for removable devices are
+  // posted.
+  std::map<std::string, DiskInfoMac> disk_info_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(RemovableDeviceNotificationsMac);
+};
+
+}  // namespace chrome
+
+#endif  // CHROME_BROWSER_SYSTEM_MONITOR_REMOVABLE_DEVICE_NOTIFICATIONS_MAC_H_