Unify markbits for old and new spaces.

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index d1306d6f3c37f62daaf8219cb7e23072dd3ee6d7..72982e93d48ecd006e2e97f67a0a2b24254c2492 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -105,11 +105,8 @@ class MacroAssembler: public Assembler {
                  Register scratch0,
                  Register scratch1,
                  LabelType* has_colour,
-                 uint32_t mask,
-                 int header_size,
                  int first_bit,
-                 int second_bit,
-                 bool in_new_space);
+                 int second_bit);
 
   template <typename LabelType>
   void InOldSpaceIsBlack(Register object,
@@ -788,9 +785,7 @@ class MacroAssembler: public Assembler {
   // unchanged.
   inline void MarkBits(Register addr_reg,
                        Register bitmap_reg,
-                       Register mask_reg,
-                       int32_t high_mask,
-                       bool in_new_space);
+                       Register mask_reg);
 
   // Compute memory operands for safepoint stack slots.
   Operand SafepointRegisterSlot(Register reg);