Implement GLX for Ozone X11.

content/gpu/gpu_main.cc

Index: content/gpu/gpu_main.cc
diff --git a/content/gpu/gpu_main.cc b/content/gpu/gpu_main.cc
index 3dfba0cc5307e0822001e879c1406de1e21f4955..c4920a18d0d932b70373032c238c776f7f685d83 100644
--- a/content/gpu/gpu_main.cc
+++ b/content/gpu/gpu_main.cc
@@ -191,6 +191,9 @@ int GpuMain(const MainFunctionParams& parameters) {
   base::MessageLoop main_message_loop(base::MessageLoop::TYPE_UI);
   std::unique_ptr<ui::PlatformEventSource> event_source =
       ui::PlatformEventSource::CreateDefault();
+#elif defined(USE_OZONE)

[rjkroege, 2016/04/27 19:08:12]

Can you use base::SysInfo::IsRunningOnChromeOS() to force OZONE on CrOS back to
the previous kind of message loop?

[kylechar, 2016/04/27 19:36:32]

If you look at patch 5, I was checking the ozone platform. Alternatively I could
use base::SysInfo::IsRunningOnChromeOS() too. I like both of those approaches
better.

+  // Ozone X11 needs a UI loop to grab Expose events. https://crbug.com/326995
+  base::MessageLoop main_message_loop(base::MessageLoop::TYPE_UI);
 #elif defined(OS_LINUX)
   base::MessageLoop main_message_loop(base::MessageLoop::TYPE_DEFAULT);
 #elif defined(OS_MACOSX)