[StorageMonitor] Move StorageMonitor ownership to BrowserProcessImpl

chrome/browser/storage_monitor/storage_monitor_chromeos_unittest.cc

Index: chrome/browser/storage_monitor/storage_monitor_chromeos_unittest.cc
diff --git a/chrome/browser/storage_monitor/storage_monitor_chromeos_unittest.cc b/chrome/browser/storage_monitor/storage_monitor_chromeos_unittest.cc
index f27e10ccc269a0504965bd35c9197c97d3269a85..aa79f78163473b09de6772a8dd85618e6abd5f1e 100644
--- a/chrome/browser/storage_monitor/storage_monitor_chromeos_unittest.cc
+++ b/chrome/browser/storage_monitor/storage_monitor_chromeos_unittest.cc
@@ -16,6 +16,7 @@
 #include "chrome/browser/storage_monitor/removable_device_constants.h"
 #include "chrome/browser/storage_monitor/storage_info.h"
 #include "chrome/browser/storage_monitor/test_media_transfer_protocol_manager_linux.h"
+#include "chrome/browser/storage_monitor/test_storage_monitor.h"
 #include "chromeos/disks/mock_disk_mount_manager.h"
 #include "content/public/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -176,6 +177,7 @@ void StorageMonitorCrosTest::SetUp() {
   mock_storage_observer_.reset(new chrome::MockRemovableStorageObserver);
 
   // Initialize the test subject.
+  chrome::test::TestStorageMonitor::RemoveSingleton();
   monitor_.reset(new TestStorageMonitorCros());
   monitor_->Init();
   monitor_->AddObserver(mock_storage_observer_.get());