Enable preaging of code objects when --optimize-for-size.

src/mips/macro-assembler-mips.h

Index: src/mips/macro-assembler-mips.h
diff --git a/src/mips/macro-assembler-mips.h b/src/mips/macro-assembler-mips.h
index 2814c943b49b3b2ec54a7a77e062cc086d402cc4..83957d724776eae3cce017c722ab57e98eb319a1 100644
--- a/src/mips/macro-assembler-mips.h
+++ b/src/mips/macro-assembler-mips.h
@@ -1498,6 +1498,9 @@ class MacroAssembler: public Assembler {
     And(reg, reg, Operand(mask));
   }
 
+  // Generates function and stub prologue code.
+  void Prologue(bool is_stub);
+
   // Activation support.
   void EnterFrame(StackFrame::Type type);
   void LeaveFrame(StackFrame::Type type);