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

chrome/installer/util/delete_reg_value_work_item_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 <windows.h>
 
 #include "base/file_util.h"
-#include "base/logging.h"
 #include "base/registry.h"
 #include "base/scoped_ptr.h"
 #include "base/string_util.h"
 #include "chrome/installer/util/delete_reg_value_work_item.h"
 #include "chrome/installer/util/work_item.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
   wchar_t test_root[] = L"DeleteRegValueWorkItemTest";
   class DeleteRegValueWorkItemTest : public testing::Test {
@@ skipping 77 matching lines @@
 
   EXPECT_FALSE(key.ValueExists(name_str.c_str()));
   EXPECT_FALSE(key.ValueExists(name_dword.c_str()));
 
   work_item1->Rollback();
   work_item2->Rollback();
 
   EXPECT_FALSE(key.ValueExists(name_str.c_str()));
   EXPECT_FALSE(key.ValueExists(name_dword.c_str()));
 }