[hdmx] Move DeviceRecord to toplevel again

More readable.

src/hb-ot-hdmx-table.hh

@@ -31,18 +31,15 @@
 
 namespace OT {
 
+
 /*
  * hdmx - Horizontal Device Metric
  */
 
 #define HB_OT_TAG_hdmx HB_TAG('h','d','m','x')
 
-struct hdmx
+struct DeviceRecord
 {
-  static const hb_tag_t tableTag = HB_OT_TAG_hdmx;
-
-  struct DeviceRecord
-  {
   struct SubsetView
   {
     const DeviceRecord *source_device_record;
@@ -96,15 +93,20 @@ struct hdmx
   inline bool sanitize (hb_sanitize_context_t *c, unsigned int size_device_record) const
   {
     TRACE_SANITIZE (this);
-      return_trace (likely (c->check_struct (this)
-                            && c->check_range (this, size_device_record)));
+    return_trace (likely (c->check_struct (this) &&
+			  c->check_range (this, size_device_record)));
   }
 
   HBUINT8 pixel_size;   /* Pixel size for following widths (as ppem). */
   HBUINT8 max_width;    /* Maximum width. */
   HBUINT8 widths[VAR];  /* Array of widths (numGlyphs is from the 'maxp' table). */
   DEFINE_SIZE_MIN (2);
-  };
+};
+
+
+struct hdmx
+{
+  static const hb_tag_t tableTag = HB_OT_TAG_hdmx;
 
   inline unsigned int get_size (void) const
   {