Always enable FCM on Mac 10.8.

content/browser/gpu/compositor_util_browsertest.cc

 // Copyright 2013 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 "content/browser/gpu/compositor_util.h"
 #include "content/test/content_browser_test.h"
 
-#if defined(OS_WIN)
+#if defined(OS_MACOSX)
+#include "base/mac/mac_util.h"
+#elif defined(OS_WIN)
 #include "base/win/windows_version.h"
 #endif
 
 namespace content {
 
 typedef ContentBrowserTest CompositorUtilTest;
 
 // Test that threaded compositing and FCM are in the expected mode on the bots
 // for all platforms.
 IN_PROC_BROWSER_TEST_F(CompositorUtilTest, CompositingModeAsExpected) {
   enum CompositingMode {
     DISABLED,
     ENABLED,
     THREADED,
   } expected_mode = DISABLED;
 #if defined(OS_ANDROID) || defined(USE_AURA)
   expected_mode = THREADED;
+#elif defined(OS_MACOSX)
+  if (base::mac::IsOSMountainLionOrLater())
+    expected_mode = ENABLED;
 #elif defined(OS_WIN)
   if (base::win::GetVersion() >= base::win::VERSION_VISTA)
     expected_mode = ENABLED;
 #endif
 
   EXPECT_EQ(expected_mode == ENABLED || expected_mode == THREADED,
             IsForceCompositingModeEnabled());
   EXPECT_EQ(expected_mode == THREADED, IsThreadedCompositingEnabled());
 }
 
 }