cc: Fix style for comments at the end of namespaces

cc/hash_pair_unittest.cc

 // Copyright (c) 2012 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 "cc/hash_pair.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+namespace {
+
 class HashPairTest : public testing::Test {
 };
 
 #define INSERT_PAIR_TEST(Type, value1, value2) \
   { \
     Type pair(value1, value2); \
     base::hash_map<Type, int> map; \
     map[pair] = 1; \
   }
 
@@ skipping 33 matching lines @@
   typedef std::pair<int64, short> Int64ShortPair;
   typedef std::pair<int64, int> Int64IntPair;
   typedef std::pair<int64, int32> Int64Int32Pair;
   typedef std::pair<int64, int64> Int64Int64Pair;
 
   INSERT_PAIR_TEST(Int64ShortPair, 4, 6);
   INSERT_PAIR_TEST(Int64IntPair, 7, (1 << 30) + 4342);
   INSERT_PAIR_TEST(Int64Int32Pair, 9, (1 << 29) + 378128932);
   INSERT_PAIR_TEST(Int64Int64Pair, 10, (1LL << 60) + 78931732321);
 }
+
+}  // anonymous namespace