[StorageMonitor] Move StorageMonitor ownership to BrowserProcessImpl

chrome/browser/storage_monitor/storage_monitor_mac_unittest.mm

Index: chrome/browser/storage_monitor/storage_monitor_mac_unittest.mm
diff --git a/chrome/browser/storage_monitor/storage_monitor_mac_unittest.mm b/chrome/browser/storage_monitor/storage_monitor_mac_unittest.mm
index d339f308cb4d1b291a28295fe6604aff286ddbff..a274126d65fb296a8f8880e848c75b77f30b8bc3 100644
--- a/chrome/browser/storage_monitor/storage_monitor_mac_unittest.mm
+++ b/chrome/browser/storage_monitor/storage_monitor_mac_unittest.mm
@@ -14,6 +14,7 @@
 #include "chrome/browser/storage_monitor/mock_removable_storage_observer.h"
 #include "chrome/browser/storage_monitor/removable_device_constants.h"
 #include "chrome/browser/storage_monitor/storage_info.h"
+#include "chrome/browser/storage_monitor/test_storage_monitor.h"
 #include "content/public/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -44,6 +45,7 @@ class StorageMonitorMacTest : public testing::Test {
   }
 
   virtual void SetUp() OVERRIDE {
+    test::TestStorageMonitor::RemoveSingleton();
     monitor_.reset(new StorageMonitorMac);
 
     mock_storage_observer_.reset(new MockRemovableStorageObserver);