Move string tokenizer to base/strings.

base/strings/string_tokenizer_unittest.cc

 // Copyright (c) 2006-2008 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 "base/string_tokenizer.h"
+#include "base/strings/string_tokenizer.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 using std::string;
 
+namespace base {
+
 namespace {
 
 TEST(StringTokenizerTest, Simple) {
   string input = "this is a test";
   StringTokenizer t(input, " ");
 
   EXPECT_TRUE(t.GetNext());
   EXPECT_EQ(string("this"), t.token());
 
   EXPECT_TRUE(t.GetNext());
@@ skipping 200 matching lines @@
   EXPECT_TRUE(t.GetNext());
   EXPECT_EQ(string("foo='a, b'"), t.token());
 
   EXPECT_TRUE(t.GetNext());
   EXPECT_EQ(string("bar"), t.token());
 
   EXPECT_FALSE(t.GetNext());
 }
 
 }  // namespace
+
+}  // namespace base