[Chrome OS]Implement MediaStorageUtil::GetDeviceInfoForPath function to support media gallery permi…

chrome/browser/system_monitor/removable_device_notifications_chromeos.h

Index: chrome/browser/system_monitor/removable_device_notifications_chromeos.h
diff --git a/chrome/browser/system_monitor/removable_device_notifications_chromeos.h b/chrome/browser/system_monitor/removable_device_notifications_chromeos.h
index cae24604fbe21324fcc1740f9f51a85229d17ef2..404540cad1069cb041a24ade2038b820a175f68f 100644
--- a/chrome/browser/system_monitor/removable_device_notifications_chromeos.h
+++ b/chrome/browser/system_monitor/removable_device_notifications_chromeos.h
@@ -28,8 +28,11 @@ class RemovableDeviceNotificationsCros
     : public base::RefCountedThreadSafe<RemovableDeviceNotificationsCros>,
       public disks::DiskMountManager::Observer {
  public:
+  // Should only be called by browser start up code. Use GetInstance() instead.
   RemovableDeviceNotificationsCros();
 
+  static RemovableDeviceNotificationsCros* GetInstance();
+
   virtual void DiskChanged(disks::DiskMountManagerEventType event,
                            const disks::DiskMountManager::Disk* disk) OVERRIDE;
   virtual void DeviceChanged(disks::DiskMountManagerEventType event,
@@ -39,11 +42,18 @@ class RemovableDeviceNotificationsCros
       MountError error_code,
       const disks::DiskMountManager::MountPointInfo& mount_info) OVERRIDE;
 
+  // Finds the device that contains |path| and populates |device_info|.
+  // Returns false if unable to find the device.
+  bool GetDeviceInfoForPath(
+      const FilePath& path,
+      base::SystemMonitor::RemovableStorageInfo* device_info) const;
+
  private:
   friend class base::RefCountedThreadSafe<RemovableDeviceNotificationsCros>;
 
-  // Mapping of mount points to mount device IDs.
-  typedef std::map<std::string, std::string> MountMap;
+  // Mapping of mount path to removable mass storage info.
+  typedef std::map<std::string, base::SystemMonitor::RemovableStorageInfo>
+      MountMap;
 
   // Private to avoid code deleting the object.
   virtual ~RemovableDeviceNotificationsCros();