Rework mirrors implementation.

runtime/vm/json.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/json.h"
 
 #include "platform/assert.h"
 #include "platform/utils.h"
 #include "vm/os.h"
 
@@ skipping 166 matching lines @@
     case '6':
     case '7':
     case '8':
     case '9':
     case '-':
       ScanNumber();
       break;
     default:
       if (IsLiteral("true")) {
         token_ = TokenTrue;
+        token_length_ = 4;
       } else if (IsLiteral("false")) {
         token_ = TokenFalse;
+        token_length_ = 5;
       } else if (IsLiteral("null")) {
         token_ = TokenNull;
+        token_length_ = 4;
       } else {
         token_length_ = 0;
         token_ = TokenIllegal;
       }
   }
 }
 
 
 JSONReader::JSONReader(const char* json_object)
 : scanner_(json_object) {
@@ skipping 136 matching lines @@
 
 void TextBuffer::GrowBuffer(intptr_t len) {
   intptr_t new_size = buf_size_ + len;
   char* new_buf = reinterpret_cast<char*>(realloc(buf_, new_size));
   ASSERT(new_buf != NULL);
   buf_ = new_buf;
   buf_size_ = new_size;
 }
 
 }  // namespace dart