mac content shell drt: Do not force the mesa gl implementation.

content/shell/shell_main_delegate.cc

Index: content/shell/shell_main_delegate.cc
diff --git a/content/shell/shell_main_delegate.cc b/content/shell/shell_main_delegate.cc
index 3e870335c7a4c9ffffee1031cf54cfa15b3731f3..3e9b81503814bcd106b4cb750ce995c7ba07c595 100644
--- a/content/shell/shell_main_delegate.cc
+++ b/content/shell/shell_main_delegate.cc
@@ -97,8 +97,10 @@ bool ShellMainDelegate::BasicStartupComplete(int* exit_code) {
   CommandLine& command_line = *CommandLine::ForCurrentProcess();
   if (command_line.HasSwitch(switches::kDumpRenderTree)) {
     command_line.AppendSwitch(switches::kAllowFileAccessFromFiles);
+#if !defined(OS_MACOSX)
     command_line.AppendSwitchASCII(
         switches::kUseGL, gfx::kGLImplementationOSMesaName);

[Nico, 2013/02/20 16:05:52]

If you remember why you added this, I can add a comment.

[zmo, 2013/02/26 20:35:18]

OSMesa support on Mac is incomplete, that's why we don't use it on Mac.

+#endif
     command_line.AppendSwitch(switches::kIgnoreGpuBlacklist);
     command_line.AppendSwitch(switches::kEnableExperimentalWebKitFeatures);
     command_line.AppendSwitch(switches::kEnableCssShaders);