[RFA 1/6] Make do_is_mi_like_p const.

[Tom Tromey <tom@tromey.com>]

This changes ui_out to make is_mi_like_p and do_is_mi_like_p "const".

ChangeLog
2018-04-29  Tom Tromey  <tom@tromey.com>

	* ui-out.c: Update.
	* cli-out.h (cli_ui_out::do_is_mi_like_p): Update.
	* ui-out.h (ui_out::is_mi_like_p): Now const.
	(ui_out::do_is_mi_like_p): Now const.
	* mi/mi-out.h (mi_ui_out::do_is_mi_like_p): Update.
---
 gdb/ChangeLog   | 8 ++++++++
 gdb/mi/mi-out.h | 2 +-
 gdb/ui-out.c    | 2 +-
 gdb/ui-out.h    | 4 ++--
 4 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/gdb/mi/mi-out.h b/gdb/mi/mi-out.h
index 7389071dcf..89ff88cd32 100644
--- a/gdb/mi/mi-out.h
+++ b/gdb/mi/mi-out.h
@@ -69,7 +69,7 @@ protected:
   virtual void do_flush () override;
   virtual void do_redirect (struct ui_file *outstream) override;
 
-  virtual bool do_is_mi_like_p () override
+  virtual bool do_is_mi_like_p () const override
   { return true; }
 
 private:
diff --git a/gdb/ui-out.c b/gdb/ui-out.c
index 3648815090..ebe0285b49 100644
--- a/gdb/ui-out.c
+++ b/gdb/ui-out.c
@@ -581,7 +581,7 @@ ui_out::test_flags (ui_out_flags mask)
 }
 
 bool
-ui_out::is_mi_like_p ()
+ui_out::is_mi_like_p () const
 {
   return do_is_mi_like_p ();
 }
diff --git a/gdb/ui-out.h b/gdb/ui-out.h
index a415100d7e..81e2e0b20d 100644
--- a/gdb/ui-out.h
+++ b/gdb/ui-out.h
@@ -119,7 +119,7 @@ class ui_out
      a hack to encapsulate that test.  Once GDB manages to separate the
      CLI/MI from the core of GDB the problem should just go away ....  */
 
-  bool is_mi_like_p ();
+  bool is_mi_like_p () const;
 
   bool query_table_field (int colno, int *width, int *alignment,
 			  const char **col_name);
@@ -157,7 +157,7 @@ class ui_out
   /* Set as not MI-like by default.  It is overridden in subclasses if
      necessary.  */
 
-  virtual bool do_is_mi_like_p ()
+  virtual bool do_is_mi_like_p () const
   { return false; }
 
  private:
-- 
2.13.6