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

base/json/string_escape.cc

Index: base/json/string_escape.cc
diff --git a/base/json/string_escape.cc b/base/json/string_escape.cc
index 469f9f98c038e1ec027fcf23203289ea4c67af88..f5d6a760218377384e4412fea2f2ab89fc6b5424 100644
--- a/base/json/string_escape.cc
+++ b/base/json/string_escape.cc
@@ -59,6 +59,14 @@ bool EscapeSpecialCodePoint(uint32 code_point, std::string* dest) {
     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;
   }