Remove logging.h from cc files that don't use it.

net/base/net_util_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/basictypes.h"
-#include "base/logging.h"
 #include "base/string_util.h"
 #include "base/time.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/net_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(OS_WIN)
 #include <ws2tcpip.h>
 #else
 #include <netdb.h>
@@ skipping 867 matching lines @@
   }
 }
 
 TEST(NetUtilTest, GetMyHostName) {
   // We can't check the result of GetMyHostName() directly, since the result
   // will differ across machines. Our goal here is to simply exercise the
   // code path, and check that things "look about right".
   std::string my_hostname = net::GetMyHostName();
   EXPECT_FALSE(my_hostname.empty());
 }