Implement MojoGetBufferInformation(), part 3.

mojo/public/platform/native/system_thunks.c

Index: mojo/public/platform/native/system_thunks.c
diff --git a/mojo/public/platform/native/system_thunks.c b/mojo/public/platform/native/system_thunks.c
index f67b42fdc5559ab3c2daf4f6111582872b42ee26..467f8e5cc317712f9a4c265d6922564ba38336a5 100644
--- a/mojo/public/platform/native/system_thunks.c
+++ b/mojo/public/platform/native/system_thunks.c
@@ -143,6 +143,13 @@ MojoResult MojoDuplicateBufferHandle(
                                         new_buffer_handle);
 }
 
+MojoResult MojoGetBufferInformation(MojoHandle buffer_handle,
+                                    struct MojoBufferInformation* info,
+                                    uint32_t info_num_bytes) {
+  assert(g_thunks.GetBufferInformation);
+  return g_thunks.GetBufferInformation(buffer_handle, info, info_num_bytes);
+}
+
 MojoResult MojoMapBuffer(MojoHandle buffer_handle,
                          uint64_t offset,
                          uint64_t num_bytes,