[StorageMonitor] Handle EjectDevice call for MTP devices

chrome/browser/storage_monitor/image_capture_device.h

Index: chrome/browser/storage_monitor/image_capture_device.h
diff --git a/chrome/browser/storage_monitor/image_capture_device.h b/chrome/browser/storage_monitor/image_capture_device.h
index 82fd1b5e77c6c878cdcc51ee50d7c0fba9f94dcb..76652ba28a0e5b3a8de66afdccaad271b0b81cc3 100644
--- a/chrome/browser/storage_monitor/image_capture_device.h
+++ b/chrome/browser/storage_monitor/image_capture_device.h
@@ -68,6 +68,8 @@ class ImageCaptureDeviceListener {
 - (void)open;
 - (void)close;
 
+- (void)eject;
+
 // Download the given file |name| to the provided |local_path|. Completion
 // notice will be sent to the listener's DownloadedFile method. The name
 // should be of the same form as those sent to the listener's ItemAdded method.