Continues Latin-1 support. All tests pass with ENABLE_LATIN_1 flag.

src/regexp-macro-assembler.cc

Index: src/regexp-macro-assembler.cc
diff --git a/src/regexp-macro-assembler.cc b/src/regexp-macro-assembler.cc
index ee9347acbb7e2bf0a1d0f0c21ee4f5ff557bff33..f73726a329514b4d2b42a8e62e2cc6aa0f7a4db3 100644
--- a/src/regexp-macro-assembler.cc
+++ b/src/regexp-macro-assembler.cc
@@ -80,11 +80,11 @@ const byte* NativeRegExpMacroAssembler::StringCharacterPosition(
   if (subject->IsOneByteRepresentation()) {
     const byte* address;
     if (StringShape(subject).IsExternal()) {
-      const char* data = ExternalAsciiString::cast(subject)->GetChars();
+      const uint8_t* data = ExternalAsciiString::cast(subject)->GetChars();
       address = reinterpret_cast<const byte*>(data);
     } else {
       ASSERT(subject->IsSeqOneByteString());
-      char* data = SeqOneByteString::cast(subject)->GetChars();
+      const uint8_t* data = SeqOneByteString::cast(subject)->GetChars();
       address = reinterpret_cast<const byte*>(data);
     }
     return address + start_index;