Compute accurate token count when loading from snapshot

runtime/vm/object.cc

Index: runtime/vm/object.cc
===================================================================
--- runtime/vm/object.cc	(revision 45790)
+++ runtime/vm/object.cc	(working copy)
@@ -7950,21 +7950,14 @@
   for (intptr_t i = 0; i < len; i++) {
     Scanner::TokenDescriptor token = tokens[i];
     if (token.kind == Token::kIDENT) {  // Identifier token.
-      if (FLAG_compiler_stats) {
-        INC_STAT(isolate, num_ident_tokens_total, 1);
-      }
       data.AddIdentToken(token.literal);
     } else if (Token::NeedsLiteralToken(token.kind)) {  // Literal token.
-      if (FLAG_compiler_stats) {
-        INC_STAT(isolate, num_literal_tokens_total, 1);
-      }
       data.AddLiteralToken(token);
     } else {  // Keyword, pseudo keyword etc.
       ASSERT(token.kind < Token::kNumTokens);
       data.AddSimpleToken(token.kind);
     }
   }
-  INC_STAT(isolate, num_tokens_total, len);
   data.AddSimpleToken(Token::kEOS);  // End of stream.
 
   // Create and setup the token stream object.