Enable windowless-based npapi_test_plugin tests on the Mac.

chrome/test/ui/npapi_uitest.cc

Index: chrome/test/ui/npapi_uitest.cc
diff --git a/chrome/test/ui/npapi_uitest.cc b/chrome/test/ui/npapi_uitest.cc
index 96b47fedbc396e62d1f6d4c95cce58698e448ad1..51e02fd768c402f60e46eb466e9cfd031a6331b1 100644
--- a/chrome/test/ui/npapi_uitest.cc
+++ b/chrome/test/ui/npapi_uitest.cc
@@ -162,7 +162,7 @@ TEST_F(NPAPITester, DISABLED_SelfDeletePluginInvokeAlert) {
                 kShortWaitTimeout);
 }
 
-#if defined(OS_WIN)
+#if defined(OS_WIN) || defined(OS_MACOSX)
 // Tests if a plugin executing a self deleting script in the context of
 // a synchronous paint event works correctly
 TEST_F(NPAPIVisiblePluginTester,
@@ -322,7 +322,7 @@ TEST_F(NPAPIIncognitoTester, PrivateEnabled) {
                 kTestCompleteSuccess, kShortWaitTimeout);
 }
 
-#if defined(OS_WIN)
+#if defined(OS_WIN) || defined(OS_MACOSX)
 // Test a browser hang due to special case of multiple
 // plugin instances indulged in sync calls across renderer.
 TEST_F(NPAPIVisiblePluginTester, MultipleInstancesSyncCalls) {