Try re-enabling DownloadsApiTest.Downloads on mac

chrome/browser/download/download_extension_apitest.cc

Index: chrome/browser/download/download_extension_apitest.cc
diff --git a/chrome/browser/download/download_extension_apitest.cc b/chrome/browser/download/download_extension_apitest.cc
index fb7f35b6e5855c3d4f7f604040b3a1b2d46226fc..c847fd410a6b7ead4fd041af1b23ca25f353fadd 100644
--- a/chrome/browser/download/download_extension_apitest.cc
+++ b/chrome/browser/download/download_extension_apitest.cc
@@ -26,13 +26,7 @@ class DownloadsApiTest : public ExtensionApiTest {
   ScopedTempDir tmpdir;
 };
 
-// Disabled on Mac. http://crbug.com/101170
-#if defined(OS_MACOSX)
-  #define MAYBE_Downloads DISABLED_Downloads
-#else
-  #define MAYBE_Downloads Downloads
-#endif
-IN_PROC_BROWSER_TEST_F(DownloadsApiTest, MAYBE_Downloads) {
+IN_PROC_BROWSER_TEST_F(DownloadsApiTest, Downloads) {
   SetUpTempDownloadsDir();
   ASSERT_TRUE(StartTestServer());
   ASSERT_TRUE(RunExtensionTest("downloads")) << message_;