Remove unmapped media galleries histograms.

components/storage_monitor/storage_monitor_chromeos.cc

 // Copyright 2014 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 "components/storage_monitor/storage_monitor_chromeos.h"
 
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
 #include "base/stl_util.h"
@@ skipping 39 matching lines @@
                    StorageInfo* info) {
   DCHECK(info);
   std::string source_path = mount_info.source_path;
 
   const DiskMountManager::Disk* disk =
       DiskMountManager::GetInstance()->FindDiskBySourcePath(source_path);
   if (!disk || disk->device_type() == chromeos::DEVICE_TYPE_UNKNOWN)
     return false;
 
   std::string unique_id = MakeDeviceUniqueId(*disk);
-  // Keep track of device uuid and label, to see how often we receive empty
-  // values.
-  base::string16 device_label = base::UTF8ToUTF16(disk->device_label());
-  MediaStorageUtil::RecordDeviceInfoHistogram(true, unique_id, device_label);
   if (unique_id.empty())
     return false;
 
   StorageInfo::Type type = has_dcim ?
       StorageInfo::REMOVABLE_MASS_STORAGE_WITH_DCIM :
       StorageInfo::REMOVABLE_MASS_STORAGE_NO_DCIM;
 
-  *info = StorageInfo(StorageInfo::MakeDeviceId(type, unique_id),
-                      mount_info.mount_path,
-                      device_label,
-                      base::UTF8ToUTF16(disk->vendor_name()),
-                      base::UTF8ToUTF16(disk->product_name()),
-                      disk->total_size_in_bytes());
+  *info = StorageInfo(
+      StorageInfo::MakeDeviceId(type, unique_id), mount_info.mount_path,
+      base::UTF8ToUTF16(disk->device_label()),
+      base::UTF8ToUTF16(disk->vendor_name()),
+      base::UTF8ToUTF16(disk->product_name()), disk->total_size_in_bytes());
   return true;
 }
 
 // Returns whether the mount point in |mount_info| is a media device or not.
 bool CheckMountedPathOnFileThread(
     const DiskMountManager::MountPointInfo& mount_info) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::FILE);
   return MediaStorageUtil::HasDcim(base::FilePath(mount_info.mount_path));
 }
 
@@ skipping 211 matching lines @@
   mount_map_.insert(std::make_pair(mount_info.mount_path, info));
 
   receiver()->ProcessAttach(info);
 }
 
 StorageMonitor* StorageMonitor::CreateInternal() {
   return new StorageMonitorCros();
 }
 
 }  // namespace storage_monitor