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

chrome/browser/extensions/api/downloads/downloads_api_unittest.cc

Index: chrome/browser/extensions/api/downloads/downloads_api_unittest.cc
diff --git a/chrome/browser/extensions/api/downloads/downloads_api_unittest.cc b/chrome/browser/extensions/api/downloads/downloads_api_unittest.cc
index d45b936fe88fe23d899a4324fe8b08e724ffb3e9..1dfdc65b71ace841befe6ea2348ced65a41c9994 100644
--- a/chrome/browser/extensions/api/downloads/downloads_api_unittest.cc
+++ b/chrome/browser/extensions/api/downloads/downloads_api_unittest.cc
@@ -109,8 +109,8 @@ class DownloadsApiUnitTest : public ExtensionApiUnittest {
 std::unique_ptr<KeyedService>
 DownloadsApiUnitTest::TestingDownloadServiceFactory(
     content::BrowserContext* browser_context) {
-  return base::WrapUnique(
-      new TestDownloadService(Profile::FromBrowserContext(browser_context)));
+  return base::MakeUnique<TestDownloadService>(
+      Profile::FromBrowserContext(browser_context));
 }
 
 // Tests that Number/double properties in query are parsed correctly.