about:gpu doesn't report sanboxing status correctly on OSX

The GPU is sandboxed on Mac, this value just defaults to "false"
and so we don't report it correctly.

NOTRY=true
BUG=348914

R=kbr@chromium.org

Review URL: https://codereview.chromium.org/385463005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@282606 0039d316-1c4b-4281-b951-d872f2087c98

content/gpu/gpu_main.cc

@@ -54,6 +54,7 @@
 
 #if defined(OS_MACOSX)
 #include "base/message_loop/message_pump_mac.h"
+#include "content/common/sandbox_mac.h"
 #endif
 
 #if defined(ADDRESS_SANITIZER)
@@ -320,6 +321,8 @@ int GpuMain(const MainFunctionParams& parameters) {
     }
 #elif defined(OS_WIN)
     gpu_info.sandboxed = StartSandboxWindows(parameters.sandbox_info);
+#elif defined(OS_MACOSX)
+    gpu_info.sandboxed = Sandbox::SandboxIsCurrentlyActive();
 #endif
   } else {
     dead_on_arrival = true;