[regexp] Port RegExpExecStub to CSA (mostly)

src/bailout-reason.h

Index: src/bailout-reason.h
diff --git a/src/bailout-reason.h b/src/bailout-reason.h
index e8b1bcac7de03f8ece17af35d73f22ab373b0a86..bd5aec64f317280afaa66c5158f13c0a5cd5ccf5 100644
--- a/src/bailout-reason.h
+++ b/src/bailout-reason.h
@@ -239,8 +239,7 @@ namespace internal {
   V(kUnexpectedStringType, "Unexpected string type")                           \
   V(kUnexpectedTestTypeofLiteralFlag,                                          \
     "Unexpected literal flag for TestTypeof bytecode")                         \
-  V(kUnexpectedTypeForRegExpDataFixedArrayExpected,                            \
-    "Unexpected type for RegExp data, FixedArray expected")                    \
+  V(kUnexpectedRegExpExecCall, "Unexpected call to the RegExpExecStub")        \
   V(kUnexpectedValue, "Unexpected value")                                      \
   V(kUnsupportedDoubleImmediate, "Unsupported double immediate")               \
   V(kUnsupportedLetCompoundAssignment, "Unsupported let compound assignment")  \