win: Make MusicManagerPrivateTest.DeviceIdValueReturned work on swarming.

chrome/browser/extensions/api/music_manager_private/music_manager_private_browsertest.cc

Index: chrome/browser/extensions/api/music_manager_private/music_manager_private_browsertest.cc
diff --git a/chrome/browser/extensions/api/music_manager_private/music_manager_private_browsertest.cc b/chrome/browser/extensions/api/music_manager_private/music_manager_private_browsertest.cc
index e729c650ef091891a095896fa38d3f39a74ff6c1..01944907e4d03091e8bfd525eee4ca72976b48b3 100644
--- a/chrome/browser/extensions/api/music_manager_private/music_manager_private_browsertest.cc
+++ b/chrome/browser/extensions/api/music_manager_private/music_manager_private_browsertest.cc
@@ -12,17 +12,8 @@ class MusicManagerPrivateTest : public extensions::PlatformAppBrowserTest {
 };
 
 IN_PROC_BROWSER_TEST_F(MusicManagerPrivateTest, DeviceIdValueReturned) {
-#if defined(OS_MACOSX) || defined(OS_LINUX)
-  // Note: Some MacOS/Linux trybots seem to run under VMware, which assigns
-  //       MAC addresses that are blacklisted. We still want the test
-  //       to succeed in that case.
-  const char* custom_arg = "device_id_may_be_undefined";
-#else
-  const char* custom_arg = NULL;
-#endif
-  ASSERT_TRUE(RunPlatformAppTestWithArg(
-      "platform_apps/music_manager_private/device_id_value_returned",
-      custom_arg))
+  ASSERT_TRUE(RunPlatformAppTest(
+      "platform_apps/music_manager_private/device_id_value_returned"))
           << message_;
 }