Revert of [regexp] Remove remainder of native RegExpExecStub

src/regexp/ia32/regexp-macro-assembler-ia32.cc

Index: src/regexp/ia32/regexp-macro-assembler-ia32.cc
diff --git a/src/regexp/ia32/regexp-macro-assembler-ia32.cc b/src/regexp/ia32/regexp-macro-assembler-ia32.cc
index ef4a389052a1ca64f975ea7e289bb481efdb4cbc..6b4ea247ef1be5468972a565db02469ff1db1bb9 100644
--- a/src/regexp/ia32/regexp-macro-assembler-ia32.cc
+++ b/src/regexp/ia32/regexp-macro-assembler-ia32.cc
@@ -69,10 +69,9 @@
  *              Address start,
  *              Address end,
  *              int* capture_output_array,
- *              int num_capture_registers,
+ *              bool at_start,
  *              byte* stack_area_base,
- *              bool direct_call = false,
- *              Isolate* isolate);
+ *              bool direct_call)
  */
 
 #define __ ACCESS_MASM(masm_)