ozone: Implement support for CreateGpuMemoryBufferFromHandle for OzoneNativePixmap backed GMBs.

ui/ozone/platform/drm/gpu/gbm_surface_factory.cc

Index: ui/ozone/platform/drm/gpu/gbm_surface_factory.cc
diff --git a/ui/ozone/platform/drm/gpu/gbm_surface_factory.cc b/ui/ozone/platform/drm/gpu/gbm_surface_factory.cc
index 060f7be7a90044edaf2b249d583bcdef49796f1b..32bb918fc25f1590130372a217a86075b3c510ba 100644
--- a/ui/ozone/platform/drm/gpu/gbm_surface_factory.cc
+++ b/ui/ozone/platform/drm/gpu/gbm_surface_factory.cc
@@ -128,13 +128,20 @@ scoped_refptr<ui::NativePixmap> GbmSurfaceFactory::CreateNativePixmap(
   if (!buffer.get())
     return nullptr;
 
-  scoped_refptr<GbmPixmap> pixmap(new GbmPixmap(buffer, this));
-  if (!pixmap->Initialize())
+  scoped_refptr<GbmPixmap> pixmap(new GbmPixmap(this));
+  if (!pixmap->InitializeFromBuffer(buffer))
     return nullptr;
 
   return pixmap;
 }
 
+scoped_refptr<ui::NativePixmap> GbmSurfaceFactory::CreateNativePixmapFromHandle(
+    const gfx::NativePixmapHandle& handle) {
+  scoped_refptr<GbmPixmap> pixmap(new GbmPixmap(this));
+  pixmap->Initialize(base::ScopedFD(handle.fd.fd), handle.stride);
+  return pixmap;
+}
+
 scoped_refptr<GbmDevice> GbmSurfaceFactory::GetGbmDevice(
     gfx::AcceleratedWidget widget) {
   return static_cast<GbmDevice*>(