Remove calls to deprecated MessageLoop methods in chrome.

chrome/browser/metrics/chromeos_metrics_provider_unittest.cc

Index: chrome/browser/metrics/chromeos_metrics_provider_unittest.cc
diff --git a/chrome/browser/metrics/chromeos_metrics_provider_unittest.cc b/chrome/browser/metrics/chromeos_metrics_provider_unittest.cc
index 4094f37a9d4760e4d33412688513149716c39020..d2a61e48ad72979f5d61dce1255f88394457e344 100644
--- a/chrome/browser/metrics/chromeos_metrics_provider_unittest.cc
+++ b/chrome/browser/metrics/chromeos_metrics_provider_unittest.cc
@@ -8,6 +8,7 @@
 
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "chrome/browser/chromeos/login/users/fake_chrome_user_manager.h"
 #include "chrome/browser/chromeos/login/users/scoped_user_manager_enabler.h"
 #include "chrome/browser/metrics/chromeos_metrics_provider.h"
@@ -128,7 +129,7 @@ class TestChromeOSMetricsProvider : public ChromeOSMetricsProvider {
     InitTaskGetBluetoothAdapter(
         base::Bind(&TestChromeOSMetricsProvider::GetBluetoothAdapterCallback,
                    base::Unretained(this)));
-    base::MessageLoop::current()->Run();
+    base::RunLoop().Run();
   }
   void GetBluetoothAdapterCallback() {
     ASSERT_TRUE(base::MessageLoop::current()->is_running());