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

base/directory_watcher_unittest.cc

 // Copyright (c) 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/directory_watcher.h"
 
 #include <fstream>
 
 #include "build/build_config.h"
 
 #include "base/file_path.h"
 #include "base/file_util.h"
-#include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
 #if defined(OS_WIN)
 #include "base/win_util.h"
 #endif
 #include "testing/gtest/include/gtest/gtest.h"
 
 // For tests where we wait a bit to verify nothing happened
 namespace {
@@ skipping 146 matching lines @@
   ASSERT_TRUE(deleter.watcher_.get() == NULL);
 }
 
 // Verify that watching a directory that doesn't exist fails, but doesn't
 // asssert.
 // Basic test: add a file and verify we notice it.
 TEST_F(DirectoryWatcherTest, NonExistentDirectory) {
   DirectoryWatcher watcher;
   ASSERT_FALSE(watcher.Watch(test_dir_.AppendASCII("does-not-exist"), this));
 }