Re-write many calls to WrapUnique() with MakeUnique()

chromecast/browser/test/chromecast_browser_test_helper_default.cc

Index: chromecast/browser/test/chromecast_browser_test_helper_default.cc
diff --git a/chromecast/browser/test/chromecast_browser_test_helper_default.cc b/chromecast/browser/test/chromecast_browser_test_helper_default.cc
index 3830fc42ffc82c71fc381237fc2bf98b635d1512..f5aad5f660f31a2b745498d92444ba3d8713f411 100644
--- a/chromecast/browser/test/chromecast_browser_test_helper_default.cc
+++ b/chromecast/browser/test/chromecast_browser_test_helper_default.cc
@@ -47,7 +47,7 @@ class DefaultHelper : public ChromecastBrowserTestHelper {
 
 std::unique_ptr<ChromecastBrowserTestHelper>
 ChromecastBrowserTestHelper::Create() {
-  return base::WrapUnique(new DefaultHelper());
+  return base::MakeUnique<DefaultHelper>();
 }
 
 }  // namespace shell