Version of MessagePumpForUI optimized for GPU process

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..a24a1f4b185a0e1ef6e8a5c7e1e7f94b57ed5712 100644
--- a/content/gpu/gpu_main.cc
+++ b/content/gpu/gpu_main.cc
@@ -184,6 +184,7 @@ int GpuMain(const MainFunctionParams& parameters) {
 #if defined(OS_WIN)
   // Use a UI message loop because ANGLE and the desktop GL platform can
   // create child windows to render to.
+  base::MessagePumpForGpu::InitFactory();
   base::MessageLoop main_message_loop(base::MessageLoop::TYPE_UI);
 #elif defined(OS_LINUX) && defined(USE_X11)
   // We need a UI loop so that we can grab the Expose events. See GLSurfaceGLX