On virtual 10.5 MultisamplingDisabled also fails.

chrome/test/gpu/gpu_feature_browsertest.cc

Index: chrome/test/gpu/gpu_feature_browsertest.cc
===================================================================
--- chrome/test/gpu/gpu_feature_browsertest.cc	(revision 132343)
+++ chrome/test/gpu/gpu_feature_browsertest.cc	(working copy)
@@ -308,6 +308,16 @@
 };
 
 IN_PROC_BROWSER_TEST_F(WebGLMultisamplingTest, MultisamplingDisabled) {
+#if defined(OS_MACOSX)
+  // Multisampling fails on virtualized mac os.
+  GPUTestBotConfig test_bot;
+  test_bot.LoadCurrentConfig(NULL);
+
+  const std::vector<uint32>& gpu_vendor = test_bot.gpu_vendor();
+  if (gpu_vendor.size() == 1 && gpu_vendor[0] == 0x15AD)
+    return;
+#endif
+
   const FilePath url(FILE_PATH_LITERAL("feature_multisampling.html"));
   RunTest(url, "\"FALSE\"", true);
 }