String:WriteUtf8: Add REPLACE_INVALID_UTF8 option

test/cctest/test-parsing.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 562 matching lines @@
       (unibrow::Utf8::kMaxTwoByteChar - unibrow::Utf8::kMaxOneByteChar) * 2 +
       (unibrow::Utf8::kMaxThreeByteChar - unibrow::Utf8::kMaxTwoByteChar) * 3;
   static const unsigned kAllUtf8CharsSizeU =
       static_cast<unsigned>(kAllUtf8CharsSize);
 
   char buffer[kAllUtf8CharsSizeU];
   unsigned cursor = 0;
   for (int i = 0; i <= kMaxUC16Char; i++) {
     cursor += unibrow::Utf8::Encode(buffer + cursor,
                                     i,
-                                    unibrow::Utf16::kNoPreviousCharacter);
+                                    unibrow::Utf16::kNoPreviousCharacter,
+                                    true);
   }
   ASSERT(cursor == kAllUtf8CharsSizeU);
 
   i::Utf8ToUtf16CharacterStream stream(reinterpret_cast<const i::byte*>(buffer),
                                        kAllUtf8CharsSizeU);
   for (int i = 0; i <= kMaxUC16Char; i++) {
     CHECK_EQU(i, stream.pos());
     int32_t c = stream.Advance();
     CHECK_EQ(i, c);
     CHECK_EQU(i + 1, stream.pos());
@@ skipping 735 matching lines @@
       "  b = function() {    \n"
       "    01;               \n"
       "  };                  \n"
       "};                    \n";
   v8::Script::Compile(v8::String::NewFromUtf8(CcTest::isolate(), script));
   CHECK(try_catch.HasCaught());
   v8::String::Utf8Value exception(try_catch.Exception());
   CHECK_EQ("SyntaxError: Octal literals are not allowed in strict mode.",
            *exception);
 }