[heap] Black is encoded with 11, grey with 10.

src/x64/macro-assembler-x64.h

Index: src/x64/macro-assembler-x64.h
diff --git a/src/x64/macro-assembler-x64.h b/src/x64/macro-assembler-x64.h
index 83ef957288104d0ff127918dca3a106bfb130162..a0ab499aa6dd8c250c795997c0508ed8aa85298c 100644
--- a/src/x64/macro-assembler-x64.h
+++ b/src/x64/macro-assembler-x64.h
@@ -236,6 +236,10 @@ class MacroAssembler: public Assembler {
                    Label* on_black,
                    Label::Distance on_black_distance = Label::kFar);
 
+  void HasColor(Register object, Register bitmap_scratch, Register mask_scratch,
+                Label* has_color, Label::Distance has_color_distance,
+                int first_bit, int second_bit);
+
   // Checks the color of an object.  If the object is white we jump to the
   // incremental marker.
   void JumpIfWhite(Register value, Register scratch1, Register scratch2,