This removes the passing of global hton to engine instance.

sql/ha_ndbcluster.cc:
  Removed global hton
sql/ha_ndbcluster.h:
  Removed global hton need
sql/ha_partition.cc:
  Removed global hton
sql/ha_partition.h:
  Removed global hton
sql/handler.cc:
  Removed global hton
sql/handler.h:
  Removed global hton
storage/archive/ha_archive.cc:
  Removed global hton
storage/archive/ha_archive.h:
  Global hton removed
storage/blackhole/ha_blackhole.cc:
  Global removed hton
storage/blackhole/ha_blackhole.h:
  Global hton removal
storage/csv/ha_tina.cc:
  Global hton removal
storage/csv/ha_tina.h:
  Removed global removed
storage/example/ha_example.cc:
  Global removed hton
storage/example/ha_example.h:
  Global removed hton
storage/federated/ha_federated.cc:
  Global removed hton
storage/federated/ha_federated.h:
  Global removed hton
storage/heap/ha_heap.cc:
  Global removed hton
storage/heap/ha_heap.h:
  Global removed hton
storage/innobase/handler/ha_innodb.cc:
  Global removed hton
storage/innobase/handler/ha_innodb.h:
  Removed global hton
storage/myisam/ha_myisam.cc:
  Globally removed hton
storage/myisam/ha_myisam.h:
  Globally removed hton
storage/myisammrg/ha_myisammrg.cc:
  Globally removed hton
storage/myisammrg/ha_myisammrg.h:
  Globaly removed hton

storage/example/ha_example.h

@@ -45,7 +45,7 @@ class ha_example: public handler
   EXAMPLE_SHARE *share;    /* Shared lock info */
 
 public:
-  ha_example(TABLE_SHARE *table_arg);
+  ha_example(handlerton *hton, TABLE_SHARE *table_arg);
   ~ha_example()
   {
   }