Estimate a (close) upper bound on the size of black-marked objects on each page.

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 bc7903f515a2abacc8589c534786aed4dcb8b6e3..6699a2d78c9096b50c4bf730c0d52677d647baef 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -137,13 +137,6 @@ class MacroAssembler: public Assembler {
                       Label* object_is_white_and_not_data,
                       Label::Distance distance);
 
-  // Detects conservatively whether an object is data-only, ie it does need to
-  // be scanned by the garbage collector.
-  void JumpIfDataObject(Register value,
-                        Register scratch,
-                        Label* not_data_object,
-                        Label::Distance not_data_object_distance);
-
   // Notify the garbage collector that we wrote a pointer into an object.
   // |object| is the object being stored into, |value| is the object being
   // stored.  value and scratch registers are clobbered by the operation.