[Media Galleries] Move RemovableStorageInfo notifications to chrome namespace (part 2)

chrome/browser/system_monitor/removable_storage_notifications.h

 // 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_STORAGE_NOTIFICATIONS_H_
 #define CHROME_BROWSER_SYSTEM_MONITOR_REMOVABLE_STORAGE_NOTIFICATIONS_H_
 
 #include "base/file_path.h"
-#include "base/system_monitor/system_monitor.h"
+#include "base/observer_list_threadsafe.h"
+#include "base/string16.h"
+#include "base/synchronization/lock.h"
 
 namespace chrome {
 
 // Base class for platform-specific instances watching for removable storage
 // attachments/detachments.
 class RemovableStorageNotifications {
  public:
+  RemovableStorageNotifications();
   virtual ~RemovableStorageNotifications() {}
 
   // Returns a pointer to an object owned by the BrowserMainParts, with lifetime
   // somewhat shorter than a process Singleton.
   static RemovableStorageNotifications* GetInstance();
 
+  struct BASE_EXPORT RemovableStorageInfo {
+    RemovableStorageInfo();
+    RemovableStorageInfo(const std::string& id,
+                         const string16& device_name,
+                         const FilePath::StringType& device_location);
+
+    // Unique device id - persists between device attachments.
+    std::string device_id;
+
+    // Human readable removable storage device name.
+    string16 name;
+
+    // Current attached removable storage device location.
+    FilePath::StringType location;
+  };
+
   // Finds the device that contains |path| and populates |device_info|.
   // Should be able to handle any path on the local system, not just removable
   // storage. Returns false if unable to find the device.
   virtual bool GetDeviceInfoForPath(
       const FilePath& path,
-      base::SystemMonitor::RemovableStorageInfo* device_info) const = 0;
+      RemovableStorageInfo* device_info) const = 0;
 
   // Returns the storage size of the device present at |location|. If the
   // device information is unavailable, returns zero.
   virtual uint64 GetStorageSize(const std::string& location) const = 0;
+
+  // Returns information for attached removable storage.
+  std::vector<RemovableStorageInfo> GetAttachedRemovableStorage() const;
+
+  class BASE_EXPORT RemovableStorageObserver {

[vandebo (ex-Chrome), 2013/01/04 19:58:38]

The Observer should not be an inner class and should be in its own header file.

[Greg Billock, 2013/01/07 21:55:18]

Sounds good. I was mimicking the existing layout pretty closely, but I'm going
to split out this change separately as a way to get started. I think that'll
break the change into three pieces, which will be good. :-)

On 2013/01/04 19:58:38, vandebo wrote:

+   public:
+    // When a removable storage device is attached or detached, one of these
+    // two events is triggered.
+    virtual void OnRemovableStorageAttached(
+        const std::string& id,
+        const string16& name,
+        const FilePath::StringType& location) {}
+    virtual void OnRemovableStorageDetached(const std::string& id) {}
+
+   protected:
+    virtual ~RemovableStorageObserver() {}
+  };
+
+  void AddRemovableStorageObserver(RemovableStorageObserver* obs);

[vandebo (ex-Chrome), 2013/01/04 19:58:38]

Since there's only one observer in this class, these can be just AddObserver and
RemoveObserver

[Greg Billock, 2013/01/07 21:55:18]

Done. This was a mouthful!

On 2013/01/04 19:58:38, vandebo wrote:

+  void RemoveRemovableStorageObserver(RemovableStorageObserver* obs);
+
+  void ProcessRemovableStorageAttached(const std::string& id,

[vandebo (ex-Chrome), 2013/01/04 19:58:38]

The process methods should not be public.  I was planning to make them protected
and make the implementations inherit from this class.

[Greg Billock, 2013/01/07 21:55:18]

Done.

+                                       const string16& name,
+                                       const FilePath::StringType& location);
+  void ProcessRemovableStorageDetached(const std::string& id);
+
+ private:
+  typedef std::map<std::string, RemovableStorageInfo> RemovableStorageMap;
+
+  void NotifyRemovableStorageAttached(const std::string& id,
+                                      const string16& name,
+                                      const FilePath::StringType& location);
+  void NotifyRemovableStorageDetached(const std::string& id);
+
+  scoped_refptr<ObserverListThreadSafe<RemovableStorageObserver> >
+      observer_list_;
+
+  // For manipulating removable_storage_map_ structure.
+  mutable base::Lock removable_storage_lock_;
+  // Map of all the attached removable storage devices.
+  RemovableStorageMap removable_storage_map_;
 };
 
 } // namespace chrome
 
 #endif  // CHROME_BROWSER_SYSTEM_MONITOR_REMOVABLE_STORAGE_NOTIFICATIONS_H_