[StorageMonitor] Handle EjectDevice call for MTP devices

chrome/browser/storage_monitor/media_transfer_protocol_device_observer_linux.h

Index: chrome/browser/storage_monitor/media_transfer_protocol_device_observer_linux.h
diff --git a/chrome/browser/storage_monitor/media_transfer_protocol_device_observer_linux.h b/chrome/browser/storage_monitor/media_transfer_protocol_device_observer_linux.h
index d95d1f6610d8d83079497b02b3791b87786d99e1..4f03a6def4c46463473e8997e0210715bf8c6943 100644
--- a/chrome/browser/storage_monitor/media_transfer_protocol_device_observer_linux.h
+++ b/chrome/browser/storage_monitor/media_transfer_protocol_device_observer_linux.h
@@ -42,6 +42,9 @@ class MediaTransferProtocolDeviceObserverLinux
   bool GetStorageInfoForPath(const base::FilePath& path,
                              StorageInfo* storage_info) const;
 
+  void EjectDevice(const std::string& device_id,
+                   base::Callback<void(StorageMonitor::EjectStatus)> callback);
+
  protected:
   // Only used in unit tests.
   MediaTransferProtocolDeviceObserverLinux(
@@ -61,6 +64,11 @@ class MediaTransferProtocolDeviceObserverLinux
   // Enumerate existing mtp storage devices.
   void EnumerateStorages();
 
+  // Find the |storage_map_| key for the record with this |device_id|. Returns
+  // true on success, false on failure.
+  bool GetLocationForDeviceId(const std::string& device_id,
+                              std::string* location);
+
   // Pointer to the MTP manager. Not owned. Client must ensure the MTP
   // manager outlives this object.
   device::MediaTransferProtocolManager* mtp_manager_;