Add bit_field3 to Map objects

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index 8996537d3dff3f594fe78cc8130d32a993db6d86..89fd1f9340637faadaf05f4d3c8090bc8e607b6e 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -1006,6 +1006,8 @@ class MacroAssembler: public Assembler {
                           DoubleRegister temp_double_reg);
 
 
+  void LoadInstanceDescriptors(Register map, Register descriptors);
+
  private:
   void CallCFunctionHelper(Register function,
                            ExternalReference function_reference,