Consult 'face-remapping-alist' for 'internal-border' face

* src/xterm.c (x_clear_under_internal_border)
(x_after_update_window_line):
* src/w32fns.c (x_clear_under_internal_border):
* src/w32term.c (x_after_update_window_line): Consult
'face-remapping-alist' when using the 'internal-border' face.

src/w32fns.c

@@ -1650,12 +1650,16 @@ x_clear_under_internal_border (struct frame *f)
   /* Clear border if it's larger than before.  */
   if (border != 0)
     {
-      HDC hdc = get_frame_dc (f);
       int width = FRAME_PIXEL_WIDTH (f);
       int height = FRAME_PIXEL_HEIGHT (f);
-      struct face *face = FACE_FROM_ID_OR_NULL (f, INTERNAL_BORDER_FACE_ID);
+      int face_id =
+	!NILP (Vface_remapping_alist)
+	? lookup_basic_face (NULL, f, INTERNAL_BORDER_FACE_ID)
+	: INTERNAL_BORDER_FACE_ID;
+      struct face *face = FACE_FROM_ID_OR_NULL (f, face_id);
 
       block_input ();
+      HDC hdc = get_frame_dc (f);
       if (face)
 	{
 	  /* Fill border with internal border face.  */

src/w32term.c

@@ -800,29 +800,32 @@ x_after_update_window_line (struct window *w, struct glyph_row *desired_row)
 	  height > 0))
     {
       int y = WINDOW_TO_FRAME_PIXEL_Y (w, max (0, desired_row->y));
+      int face_id =
+	!NILP (Vface_remapping_alist)
+	? lookup_basic_face (NULL, f, INTERNAL_BORDER_FACE_ID)
+	: INTERNAL_BORDER_FACE_ID;
+      struct face *face = FACE_FROM_ID_OR_NULL (f, face_id);
 
       block_input ();
-      {
-	HDC hdc = get_frame_dc (f);
-	struct face *face = FACE_FROM_ID_OR_NULL (f, INTERNAL_BORDER_FACE_ID);
 
-	if (face)
-	  {
-	    /* Fill border with internal border face.  */
-	    unsigned long color = face->background;
+      HDC hdc = get_frame_dc (f);
+      if (face)
+	{
+	  /* Fill border with internal border face.  */
+	  unsigned long color = face->background;
+
+	  w32_fill_area (f, hdc, color, 0, y, width, height);
+	  w32_fill_area (f, hdc, color, FRAME_PIXEL_WIDTH (f) - width,
+			 y, width, height);
+	}
+      else
+	{
+	  w32_clear_area (f, hdc, 0, y, width, height);
+	  w32_clear_area (f, hdc, FRAME_PIXEL_WIDTH (f) - width,
+			  y, width, height);
+	}
+      release_frame_dc (f, hdc);
 
-	    w32_fill_area (f, hdc, color, 0, y, width, height);
-	    w32_fill_area (f, hdc, color, FRAME_PIXEL_WIDTH (f) - width,
-			   y, width, height);
-	  }
-	else
-	  {
-	    w32_clear_area (f, hdc, 0, y, width, height);
-	    w32_clear_area (f, hdc, FRAME_PIXEL_WIDTH (f) - width,
-			    y, width, height);
-	  }
-	release_frame_dc (f, hdc);
-      }
       unblock_input ();
     }
 }

src/xterm.c

@@ -1302,7 +1302,11 @@ x_clear_under_internal_border (struct frame *f)
 #else
       int margin = FRAME_TOP_MARGIN_HEIGHT (f);
 #endif
-      struct face *face = FACE_FROM_ID_OR_NULL (f, INTERNAL_BORDER_FACE_ID);
+      int face_id =
+	!NILP (Vface_remapping_alist)
+	? lookup_basic_face (NULL, f, INTERNAL_BORDER_FACE_ID)
+	: INTERNAL_BORDER_FACE_ID;
+      struct face *face = FACE_FROM_ID_OR_NULL (f, face_id);
 
       block_input ();
 
@@ -1365,7 +1369,11 @@ x_after_update_window_line (struct window *w, struct glyph_row *desired_row)
 	    height > 0))
       {
 	int y = WINDOW_TO_FRAME_PIXEL_Y (w, max (0, desired_row->y));
-	struct face *face = FACE_FROM_ID_OR_NULL (f, INTERNAL_BORDER_FACE_ID);
+	int face_id =
+	  !NILP (Vface_remapping_alist)
+	  ? lookup_basic_face (NULL, f, INTERNAL_BORDER_FACE_ID)
+	  : INTERNAL_BORDER_FACE_ID;
+	struct face *face = FACE_FROM_ID_OR_NULL (f, face_id);
 
 	block_input ();
 	if (face)