Add "." accessors to GN.

tools/gn/tokenizer_unittest.cc

 // Copyright (c) 2013 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 "testing/gtest/include/gtest/gtest.h"
 #include "tools/gn/input_file.h"
 #include "tools/gn/token.h"
 #include "tools/gn/tokenizer.h"
 
 namespace {
@@ skipping 81 matching lines @@
     { Token::MINUS_EQUALS, "-=" },
     { Token::NOT_EQUAL, "!=" },
     { Token::EQUAL_EQUAL, "==" },
     { Token::LESS_THAN, "<" },
     { Token::GREATER_THAN, ">" },
     { Token::LESS_EQUAL, "<=" },
     { Token::GREATER_EQUAL, ">=" },
     { Token::BANG, "!" },
     { Token::BOOLEAN_OR, "||" },
     { Token::BOOLEAN_AND, "&&" },
+    { Token::DOT, "." },
+    { Token::COMMA, "," },
   };
-  EXPECT_TRUE(CheckTokenizer("- + = += -= != ==  < > <= >= ! || &&",
+  EXPECT_TRUE(CheckTokenizer("- + = += -= != ==  < > <= >= ! || && . ,",
               operators));
 }
 
 TEST(Tokenizer, Scoper) {
   TokenExpectation scopers[] = {
     { Token::LEFT_BRACE, "{" },
     { Token::LEFT_BRACKET, "[" },
     { Token::RIGHT_BRACKET, "]" },
     { Token::RIGHT_BRACE, "}" },
     { Token::LEFT_PAREN, "(" },
@@ skipping 50 matching lines @@
   EXPECT_EQ('x', input1[Tokenizer::ByteOffsetOfNthLine(input1, 2)]);
   EXPECT_EQ('y', input1[Tokenizer::ByteOffsetOfNthLine(input1, 4)]);
 
   char input2[3];
   input2[0] = 'a';
   input2[1] = '\n';  // Manually set to avoid Windows double-byte endings.
   input2[2] = 0;
   EXPECT_EQ(0u, Tokenizer::ByteOffsetOfNthLine(input2, 1));
   EXPECT_EQ(2u, Tokenizer::ByteOffsetOfNthLine(input2, 2));
 }