Revert of Revert of content: Fix single process support for native GpuMemoryBuffers.

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 f520aebfa7a22ab2609124771fbac7f7eb8071b8..1a543ca8509fd44a7d3695a50e9be731291bf6cc 100644
--- a/content/gpu/gpu_main.cc
+++ b/content/gpu/gpu_main.cc
@@ -365,12 +365,9 @@
 
   logging::SetLogMessageHandler(NULL);
 
-  std::vector<gfx::GpuMemoryBufferType> supported_types;
-  GpuMemoryBufferFactory::GetSupportedTypes(&supported_types);
-  DCHECK(!supported_types.empty());
-  // Note: We always use the preferred type.
   scoped_ptr<GpuMemoryBufferFactory> gpu_memory_buffer_factory =
-      GpuMemoryBufferFactory::Create(supported_types[0]);
+      GpuMemoryBufferFactory::Create(
+          GpuChildThread::GetGpuMemoryBufferFactoryType());
 
   GpuProcess gpu_process;