On virtual 10.5 MultisamplingDisabled also fails.

chrome/test/gpu/gpu_feature_browsertest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/test/trace_event_analyzer.h"
 #include "base/version.h"
@@ skipping 290 matching lines @@
 
 class WebGLMultisamplingTest : public GpuFeatureTest {
  public:
   virtual void SetUpCommandLine(CommandLine* command_line) {
     GpuFeatureTest::SetUpCommandLine(command_line);
     command_line->AppendSwitch(switches::kDisableGLMultisampling);
   }
 };
 
 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);
 }
 
 IN_PROC_BROWSER_TEST_F(GpuFeatureTest, Canvas2DAllowed) {
 #if defined(OS_WIN)
   // Accelerated canvas 2D is not supported on XP.
   GPUTestBotConfig test_bot;
   test_bot.LoadCurrentConfig(NULL);
   if (test_bot.os() == GPUTestConfig::kOsWinXP)
@@ skipping 93 matching lines @@
   // indicate that the renderer is not simply spinning on RAF.
   EXPECT_GT(stats.mean_us, 15000.0);
 
   // Print out the trace events upon error to debug failures.
   if (stats.mean_us <= 15000.0) {
     fprintf(stderr, "\n\nTRACE JSON:\n\n%s\n\n", trace_events_json_.c_str());
   }
 }
 
 }  // namespace anonymous