Add GpuMemoryBuffer support for DXGI handles.

gpu/ipc/service/gpu_memory_buffer_factory.cc

Index: gpu/ipc/service/gpu_memory_buffer_factory.cc
diff --git a/gpu/ipc/service/gpu_memory_buffer_factory.cc b/gpu/ipc/service/gpu_memory_buffer_factory.cc
index 8e179a4818d7097eec1cfd9ad36aa59c111483d5..fc933f6ae8e8689bef96a47fb55e36f0366382c1 100644
--- a/gpu/ipc/service/gpu_memory_buffer_factory.cc
+++ b/gpu/ipc/service/gpu_memory_buffer_factory.cc
@@ -16,6 +16,10 @@
 #include "gpu/ipc/service/gpu_memory_buffer_factory_native_pixmap.h"
 #endif
 
+#if defined(OS_WIN)
+#include "gpu/ipc/service/gpu_memory_buffer_factory_win.h"
+#endif
+
 namespace gpu {
 
 // static
@@ -27,7 +31,11 @@ GpuMemoryBufferFactory::CreateNativeType() {
 #if defined(OS_LINUX)
   return base::WrapUnique(new GpuMemoryBufferFactoryNativePixmap);
 #endif
+#if defined(OS_WIN)
+  return base::WrapUnique(new GpuMemoryBufferFactoryWin);
+#else
   return nullptr;
+#endif
 }
 
 }  // namespace gpu