Move the cookie store implementation into its own directory.

net/base/cookie_util_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 "base/basictypes.h"
-#include "net/base/cookie_util.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-TEST(CookieUtilTest, TestDomainIsHostOnly) {
-  const struct {
-    const char* str;
-    const bool is_host_only;
-  } tests[] = {
-    { "",               true },
-    { "www.google.com", true },
-    { ".google.com",    false }
-  };
-
-  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); ++i) {
-    EXPECT_EQ(tests[i].is_host_only,
-              net::cookie_util::DomainIsHostOnly(tests[i].str));
-  }
-}