[Media Galleries] Ignore Mac PTP volumes mounted with mass storage

chrome/browser/storage_monitor/image_capture_device_manager.mm

 // 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.
 
 #include "chrome/browser/storage_monitor/image_capture_device_manager.h"
 
 #import <ImageCaptureCore/ImageCaptureCore.h>
 
 #include "base/file_util.h"
 #import "chrome/browser/storage_monitor/image_capture_device.h"
@@ skipping 71 matching lines @@
   }
   return nil;
 }
 
 - (void)deviceBrowser:(ICDeviceBrowser*)browser
          didAddDevice:(ICDevice*)addedDevice
            moreComing:(BOOL)moreComing {
   if (!(addedDevice.type & ICDeviceTypeCamera))
     return;
 
+  // Ignore mass storage attaches -- those will be handled
+  // by Mac's removable storage watcher.
+  if ([addedDevice.transportType isEqualToString:ICTransportTypeMassStorage])
+    return;
+
   ICCameraDevice* cameraDevice =
       base::mac::ObjCCastStrict<ICCameraDevice>(addedDevice);
 
   [cameras_ addObject:addedDevice];
 
   // TODO(gbillock): use [cameraDevice mountPoint] here when possible.
   notifications_->ProcessAttach(
       chrome::StorageInfo(
           chrome::MediaStorageUtil::MakeDeviceId(
               chrome::MediaStorageUtil::MAC_IMAGE_CAPTURE,
@@ skipping 42 matching lines @@
   ImageCaptureDeviceManagerImpl* manager =
       g_image_capture_device_manager->device_browser_;
   return [manager deviceForUUID:uuid];
 }
 
 id<ICDeviceBrowserDelegate> ImageCaptureDeviceManager::device_browser() {
   return device_browser_.get();
 }
 
 }  // namespace chrome