Treat U+2028 as a special code point when escaping for JSON.

base/json/string_escape.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/json/string_escape.h"
 
 #include <string>
 
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 41 matching lines @@
       dest->append("\\\\");
       break;
     case '"':
       dest->append("\\\"");
       break;
     // Escape < to prevent script execution; escaping > is not necessary and
     // not doing so save a few bytes.
     case '<':
       dest->append("\\u003C");
       break;
+    // Escape the "Line Separator" and "Paragraph Separator" characters, since
+    // they should be treated like a new line \r or \n.
+    case 0x2028:
+      dest->append("\\u2028");
+      break;
+    case 0x2029:
+      dest->append("\\u2029");
+      break;
     default:
       return false;
   }
   return true;
 }
 
 template <typename S>
 bool EscapeJSONStringImpl(const S& str, bool put_in_quotes, std::string* dest) {
   bool did_replacement = false;
 
@@ skipping 73 matching lines @@
       dest.push_back(*it);
   }
 
   if (put_in_quotes)
     dest.push_back('"');
 
   return dest;
 }
 
 }  // namespace base