[Media Galleries] Lazily initialize the storage monitor.

chrome/browser/storage_monitor/storage_monitor_unittest.cc

Index: chrome/browser/storage_monitor/storage_monitor_unittest.cc
diff --git a/chrome/browser/storage_monitor/storage_monitor_unittest.cc b/chrome/browser/storage_monitor/storage_monitor_unittest.cc
index bc57f4afa9474bf5f244f44861fcaaadbe61c520..21ee0fbfc6812e37ea817b0d4f27d51d20e7f525 100644
--- a/chrome/browser/storage_monitor/storage_monitor_unittest.cc
+++ b/chrome/browser/storage_monitor/storage_monitor_unittest.cc
@@ -8,11 +8,14 @@
 #include "chrome/browser/storage_monitor/mock_removable_storage_observer.h"
 #include "chrome/browser/storage_monitor/storage_monitor.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"
 
 namespace chrome {
 
 TEST(StorageMonitorTest, TestInitialize) {
+  MessageLoopForUI message_loop_;
+  content::TestBrowserThread(content::BrowserThread::UI, &message_loop_);
   test::TestStorageMonitor monitor;
   EXPECT_FALSE(monitor.init_called_);