Make some foo.h headers usable without foo-inl.h header.

src/layout-descriptor-inl.h

Index: src/layout-descriptor-inl.h
diff --git a/src/layout-descriptor-inl.h b/src/layout-descriptor-inl.h
index cb3325b31f90ecc6e78e9af693e107712d06ede8..3771064c8fa4f9c5d92034470d1f5dc1ec990134 100644
--- a/src/layout-descriptor-inl.h
+++ b/src/layout-descriptor-inl.h
@@ -56,6 +56,11 @@ bool LayoutDescriptor::GetIndexes(int field_index, int* layout_word_index,
 }
 
 
+LayoutDescriptor* LayoutDescriptor::SetRawData(int field_index) {
+  return SetTagged(field_index, false);
+}
+
+
 LayoutDescriptor* LayoutDescriptor::SetTagged(int field_index, bool tagged) {
   int layout_word_index;
   int layout_bit_index;