Change print_recreate_thread to a method

This changes print_recreate_thread to be a method on breakpoint.  This
function is only used as a helper by print_recreate methods, so I
thought this transformation made sense.

gdb/ada-lang.c

@@ -12519,7 +12519,7 @@ ada_catchpoint::print_recreate (struct ui_file *fp)
       default:
 	internal_error (__FILE__, __LINE__, _("unexpected catchpoint type"));
     }
-  print_recreate_thread (this, fp);
+  print_recreate_thread (fp);
 }
 
 /* See ada-lang.h.  */

gdb/break-catch-exec.c

@@ -144,7 +144,7 @@ void
 exec_catchpoint::print_recreate (struct ui_file *fp)
 {
   gdb_printf (fp, "catch exec");
-  print_recreate_thread (this, fp);
+  print_recreate_thread (fp);
 }
 
 /* This function attempts to parse an optional "if <cond>" clause

gdb/break-catch-fork.c

@@ -172,7 +172,7 @@ void
 fork_catchpoint::print_recreate (struct ui_file *fp)
 {
   gdb_printf (fp, "catch %s", is_vfork ? "vfork" : "fork");
-  print_recreate_thread (this, fp);
+  print_recreate_thread (fp);
 }
 
 static void

gdb/break-catch-syscall.c

@@ -331,7 +331,7 @@ syscall_catchpoint::print_recreate (struct ui_file *fp)
 	gdb_printf (fp, " %d", s.number);
     }
 
-  print_recreate_thread (this, fp);
+  print_recreate_thread (fp);
 }
 
 /* Returns non-zero if 'b' is a syscall catchpoint.  */

gdb/break-catch-throw.c

@@ -338,7 +338,7 @@ exception_catchpoint::print_recreate (struct ui_file *fp)
       gdb_printf (fp, "rethrow");
       break;
     }
-  print_recreate_thread (this, fp);
+  print_recreate_thread (fp);
 }
 
 /* Implement the "allocate_location" method for throw and catch

gdb/breakpoint.c

@@ -9335,7 +9335,7 @@ ranged_breakpoint::print_recreate (struct ui_file *fp)
   gdb_printf (fp, "break-range %s, %s",
 	      event_location_to_string (location.get ()),
 	      event_location_to_string (location_range_end.get ()));
-  print_recreate_thread (this, fp);
+  print_recreate_thread (fp);
 }
 
 /* Find the address where the end of the breakpoint range should be
@@ -9739,7 +9739,7 @@ watchpoint::print_recreate (struct ui_file *fp)
     }
 
   gdb_printf (fp, " %s", exp_string.get ());
-  print_recreate_thread (this, fp);
+  print_recreate_thread (fp);
 }
 
 /* Implement the "explains_signal" method for watchpoints.  */
@@ -9927,7 +9927,7 @@ masked_watchpoint::print_recreate (struct ui_file *fp)
 
   gdb_printf (fp, " %s mask 0x%s", exp_string.get (),
 	      phex (hw_wp_mask, sizeof (CORE_ADDR)));
-  print_recreate_thread (this, fp);
+  print_recreate_thread (fp);
 }
 
 /* Tell whether the given watchpoint is a masked hardware watchpoint.  */
@@ -11807,7 +11807,7 @@ ordinary_breakpoint::print_recreate (struct ui_file *fp)
   if (loc == NULL && extra_string != NULL)
     gdb_printf (fp, " %s", extra_string.get ());
 
-  print_recreate_thread (this, fp);
+  print_recreate_thread (fp);
 }
 
 std::vector<symtab_and_line>
@@ -12055,7 +12055,7 @@ tracepoint::print_recreate (struct ui_file *fp)
 		    _("unhandled tracepoint type %d"), (int) type);
 
   gdb_printf (fp, " %s", event_location_to_string (location.get ()));
-  print_recreate_thread (this, fp);
+  print_recreate_thread (fp);
 
   if (pass_count)
     gdb_printf (fp, "  passcount %d\n", pass_count);
@@ -12112,7 +12112,7 @@ dprintf_breakpoint::print_recreate (struct ui_file *fp)
   gdb_printf (fp, "dprintf %s,%s",
 	      event_location_to_string (location.get ()),
 	      extra_string.get ());
-  print_recreate_thread (this, fp);
+  print_recreate_thread (fp);
 }
 
 /* Implement the "after_condition_true" method for dprintf.
@@ -14044,13 +14044,13 @@ get_tracepoint_by_number (const char **arg,
 }
 
 void
-print_recreate_thread (struct breakpoint *b, struct ui_file *fp)
+breakpoint::print_recreate_thread (struct ui_file *fp) const
 {
-  if (b->thread != -1)
-    gdb_printf (fp, " thread %d", b->thread);
+  if (thread != -1)
+    gdb_printf (fp, " thread %d", thread);
 
-  if (b->task != 0)
-    gdb_printf (fp, " task %d", b->task);
+  if (task != 0)
+    gdb_printf (fp, " task %d", task);
 
   gdb_printf (fp, "\n");
 }

gdb/breakpoint.h

@@ -586,15 +586,6 @@ struct breakpoint_ops
 				  int, int, int, unsigned);
 };
 
-/* Helper for breakpoint_ops->print_recreate implementations.  Prints
-   the "thread" or "task" condition of B, and then a newline.
-
-   Necessary because most breakpoint implementations accept
-   thread/task conditions at the end of the spec line, like "break foo
-   thread 1", which needs outputting before any breakpoint-type
-   specific extra command necessary for B's recreation.  */
-extern void print_recreate_thread (struct breakpoint *b, struct ui_file *fp);
-
 enum watchpoint_triggered
 {
   /* This watchpoint definitely did not trigger.  */
@@ -742,7 +733,6 @@ struct breakpoint
     /* Nothing to do.  */
   }
 
-
   /* Return a range of this breakpoint's locations.  */
   bp_location_range locations ();
 
@@ -846,6 +836,17 @@ struct breakpoint
 
   /* Same as py_bp_object, but for Scheme.  */
   gdbscm_breakpoint_object *scm_bp_object = NULL;
+
+protected:
+
+  /* Helper for breakpoint_ops->print_recreate implementations.  Prints
+     the "thread" or "task" condition of B, and then a newline.
+
+     Necessary because most breakpoint implementations accept
+     thread/task conditions at the end of the spec line, like "break foo
+     thread 1", which needs outputting before any breakpoint-type
+     specific extra command necessary for B's recreation.  */
+  void print_recreate_thread (struct ui_file *fp) const;
 };
 
 /* The structure to be inherit by all kinds of breakpoints (real