Linux: update base/third_party/xdg_mime from upstream.

base/third_party/xdg_mime/xdgmime.c

Index: base/third_party/xdg_mime/xdgmime.c
===================================================================
--- base/third_party/xdg_mime/xdgmime.c	(revision 150109)
+++ base/third_party/xdg_mime/xdgmime.c	(working copy)
@@ -26,7 +26,7 @@
  */
 
 #ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
 #endif
 
 #include "xdgmime.h"
@@ -64,6 +64,8 @@
 static int n_caches = 0;
 
 const char xdg_mime_type_unknown[] = "application/octet-stream";
+const char xdg_mime_type_empty[] = "application/x-zerosize";
+const char xdg_mime_type_textplain[] = "text/plain";
 
 
 enum
@@ -165,7 +167,7 @@
   strcpy (file_name, directory); strcat (file_name, "/mime/globs2");
   if (stat (file_name, &st) == 0)
     {
-      _xdg_mime_glob_read_from_file (global_hash, file_name);
+      _xdg_mime_glob_read_from_file (global_hash, file_name, TRUE);
       xdg_dir_time_list_add (file_name, st.st_mtime);
     }
   else
@@ -175,7 +177,7 @@
       strcpy (file_name, directory); strcat (file_name, "/mime/globs");
       if (stat (file_name, &st) == 0)
         {
-          _xdg_mime_glob_read_from_file (global_hash, file_name);
+          _xdg_mime_glob_read_from_file (global_hash, file_name, FALSE);
           xdg_dir_time_list_add (file_name, st.st_mtime);
         }
       else
@@ -467,17 +469,23 @@
 {
   const char *mime_type;
 
+  if (len == 0)
+    {
+      *result_prio = 100;
+      return XDG_MIME_TYPE_EMPTY;
+    }
+
   xdg_mime_init ();
 
   if (_caches)
-    return _xdg_mime_cache_get_mime_type_for_data (data, len, result_prio);
+    mime_type = _xdg_mime_cache_get_mime_type_for_data (data, len, result_prio);
+  else
+    mime_type = _xdg_mime_magic_lookup_data (global_magic, data, len, result_prio, NULL, 0);
 
-  mime_type = _xdg_mime_magic_lookup_data (global_magic, data, len, result_prio, NULL, 0);
-
   if (mime_type)
     return mime_type;
 
-  return XDG_MIME_TYPE_UNKNOWN;
+  return _xdg_binary_or_text_fallback(data, len);
 }
 
 const char *
@@ -556,7 +564,7 @@
   if (mime_type)
     return mime_type;
 
-  return XDG_MIME_TYPE_UNKNOWN;
+  return _xdg_binary_or_text_fallback(data, bytes_read);
 }
 
 const char *