Remove unmapped media galleries histograms.

components/storage_monitor/media_storage_util.cc

Index: components/storage_monitor/media_storage_util.cc
diff --git a/components/storage_monitor/media_storage_util.cc b/components/storage_monitor/media_storage_util.cc
index 5dbfdcc083ebeff078f2d82083091ac797f60817..7841e4e294e339e965767b6b3afc0df80a988e6f 100644
--- a/components/storage_monitor/media_storage_util.cc
+++ b/components/storage_monitor/media_storage_util.cc
@@ -9,7 +9,6 @@
 #include "base/callback.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
-#include "base/metrics/histogram_macros.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
@@ -23,19 +22,6 @@ namespace storage_monitor {
 
 namespace {
 
-// MediaDeviceNotification.DeviceInfo histogram values.
-enum DeviceInfoHistogramBuckets {
-  MASS_STORAGE_DEVICE_NAME_AND_UUID_AVAILABLE,
-  MASS_STORAGE_DEVICE_UUID_MISSING,
-  MASS_STORAGE_DEVICE_NAME_MISSING,
-  MASS_STORAGE_DEVICE_NAME_AND_UUID_MISSING,
-  MTP_STORAGE_DEVICE_NAME_AND_UUID_AVAILABLE,
-  MTP_STORAGE_DEVICE_UUID_MISSING,
-  MTP_STORAGE_DEVICE_NAME_MISSING,
-  MTP_STORAGE_DEVICE_NAME_AND_UUID_MISSING,
-  DEVICE_INFO_BUCKET_BOUNDARY
-};
-
 #if !defined(OS_WIN)
 const char kRootPath[] = "/";
 #endif
@@ -213,30 +199,6 @@ base::FilePath MediaStorageUtil::FindDevicePathById(
 }
 
 // static
-void MediaStorageUtil::RecordDeviceInfoHistogram(
-    bool mass_storage,
-    const std::string& device_uuid,
-    const base::string16& device_label) {
-  unsigned int event_number = 0;
-  if (!mass_storage)
-    event_number = 4;
-
-  if (device_label.empty())
-    event_number += 2;
-
-  if (device_uuid.empty())
-    event_number += 1;
-  enum DeviceInfoHistogramBuckets event =
-      static_cast<enum DeviceInfoHistogramBuckets>(event_number);
-  if (event >= DEVICE_INFO_BUCKET_BOUNDARY) {
-    NOTREACHED();
-    return;
-  }
-  UMA_HISTOGRAM_ENUMERATION("MediaDeviceNotifications.DeviceInfo", event,
-                            DEVICE_INFO_BUCKET_BOUNDARY);
-}
-
-// static
 bool MediaStorageUtil::IsRemovableStorageAttached(const std::string& id) {
   StorageMonitor* monitor = StorageMonitor::GetInstance();
   if (!monitor)