Mozart: Specify texture origin explicitly.

mojo/ui/gl_renderer.h

Index: mojo/ui/gl_renderer.h
diff --git a/mojo/ui/gl_renderer.h b/mojo/ui/gl_renderer.h
index a21c799fb9b792a0d389b2b7322880062289af8c..71cf0d96953080042a6d7b924f4ab823c64b4793 100644
--- a/mojo/ui/gl_renderer.h
+++ b/mojo/ui/gl_renderer.h
@@ -47,7 +47,9 @@ class GLRenderer {
   // The caller should add the resource to its scene.
   // Returns a nullptr if the GLContext was destroyed.
   mojo::gfx::composition::ResourcePtr BindTextureResource(
-      std::unique_ptr<GLTexture> texture);
+      std::unique_ptr<GLTexture> texture,
+      mojo::gfx::composition::MailboxTextureResource::Origin origin =
+          mojo::gfx::composition::MailboxTextureResource::Origin::BOTTOM_LEFT);
 
   // Allocates a GL texture, binds it to a framebuffer, invokes the
   // provided function, then returns the resulting resource.