Handle block comments ending in **/ in the JSON parser

base/json/json_parser.cc

Index: base/json/json_parser.cc
diff --git a/base/json/json_parser.cc b/base/json/json_parser.cc
index 8442b012bcb698a1bab52d34f045290283ac083a..cc669f4779836bc1f71af323714f72325b6035a1 100644
--- a/base/json/json_parser.cc
+++ b/base/json/json_parser.cc
@@ -435,15 +435,18 @@ bool JSONParser::EatComment() {
         return true;
     }
   } else if (next_char == '*') {
+    char previous_char = '\0';
     // Block comment, read until end marker.
-    while (CanConsume(2)) {
-      if (*NextChar() == '*' && *NextChar() == '/') {
+    while (CanConsume(1)) {
+      next_char = *NextChar();
+      if (previous_char == '*' && next_char == '/') {
         // EatWhitespaceAndComments will inspect pos_, which will still be on
         // the last / of the comment, so advance once more (which may also be
         // end of input).
         NextChar();
         return true;
       }
+      previous_char = next_char;
     }
 
     // If the comment is unterminated, GetNextToken will report T_END_OF_INPUT.