Adds option for JSON reader to allow invalid utf characters

base/json/json_parser_unittest.cc

Index: base/json/json_parser_unittest.cc
diff --git a/base/json/json_parser_unittest.cc b/base/json/json_parser_unittest.cc
index eacd1024993ce5d1924fde1273bbba317345434d..ab6875b4d282c20f0096bab327a1588d7b4a8bf0 100644
--- a/base/json/json_parser_unittest.cc
+++ b/base/json/json_parser_unittest.cc
@@ -17,8 +17,9 @@ namespace internal {
 
 class JSONParserTest : public testing::Test {
  public:
-  JSONParser* NewTestParser(const std::string& input) {
-    JSONParser* parser = new JSONParser(JSON_PARSE_RFC);
+  JSONParser* NewTestParser(const std::string& input,
+                            int options = JSON_PARSE_RFC) {
+    JSONParser* parser = new JSONParser(options);
     parser->start_pos_ = input.data();
     parser->pos_ = parser->start_pos_;
     parser->end_pos_ = parser->start_pos_ + input.length();
@@ -328,5 +329,18 @@ TEST_F(JSONParserTest, DecodeNegativeEscapeSequence) {
   EXPECT_FALSE(JSONReader::Read("[\"\\u-00A\"]"));
 }
 
+// Verifies invalid utf-8 characters are read back in as is.
+TEST_F(JSONParserTest, KeepInvalidCharacters) {
+  const std::string bogus_char = "󿿿";
+  const std::string quoted_bogus_char = "\"" + bogus_char + "\"";
+  std::unique_ptr<JSONParser> parser(
+      NewTestParser(quoted_bogus_char, JSON_ALLOW_NON_UTF_STRINGS));
+  std::unique_ptr<Value> value(parser->ConsumeString());
+  ASSERT_TRUE(value.get());
+  std::string str;
+  EXPECT_TRUE(value->GetAsString(&str));
+  EXPECT_EQ(bogus_char, str);
+}
+
 }  // namespace internal
 }  // namespace base