Move the cookie store implementation into its own directory.

net/base/cookie_store.cc

Index: net/base/cookie_store.cc
diff --git a/net/base/cookie_store.cc b/net/base/cookie_store.cc
deleted file mode 100644
index a806d6c5bfdd2aae22fd7c8a347bad41c91de595..0000000000000000000000000000000000000000
--- a/net/base/cookie_store.cc
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright (c) 2011 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 "net/base/cookie_store.h"
-
-#include "net/base/cookie_options.h"
-
-namespace net {
-
-CookieStore::CookieStore() {}
-
-CookieStore::~CookieStore() {}
-
-CookieStore::CookieInfo::CookieInfo() {}
-
-CookieStore::CookieInfo::~CookieInfo() {}
-
-}  // namespace net