Remove high promotion mode.

src/x87/macro-assembler-x87.cc

Index: src/x87/macro-assembler-x87.cc
diff --git a/src/x87/macro-assembler-x87.cc b/src/x87/macro-assembler-x87.cc
index 04a9119023720f329ba8a6d66dbe139b2be24cec..57fb53a3200716319542effea1cae1b667908c23 100644
--- a/src/x87/macro-assembler-x87.cc
+++ b/src/x87/macro-assembler-x87.cc
@@ -1689,32 +1689,13 @@ void MacroAssembler::AllocateAsciiConsString(Register result,
                                              Register scratch1,
                                              Register scratch2,
                                              Label* gc_required) {
-  Label allocate_new_space, install_map;
-  AllocationFlags flags = TAG_OBJECT;
-
-  ExternalReference high_promotion_mode = ExternalReference::
-      new_space_high_promotion_mode_active_address(isolate());
-
-  test(Operand::StaticVariable(high_promotion_mode), Immediate(1));
-  j(zero, &allocate_new_space);
-
-  Allocate(ConsString::kSize,
-           result,
-           scratch1,
-           scratch2,
-           gc_required,
-           static_cast<AllocationFlags>(flags | PRETENURE_OLD_POINTER_SPACE));
-  jmp(&install_map);
-
-  bind(&allocate_new_space);
   Allocate(ConsString::kSize,
            result,
            scratch1,
            scratch2,
            gc_required,
-           flags);
+           TAG_OBJECT);
 
-  bind(&install_map);
   // Set the map. The other fields are left uninitialized.
   mov(FieldOperand(result, HeapObject::kMapOffset),
       Immediate(isolate()->factory()->cons_ascii_string_map()));