Move WriteFile and WriteFileDescriptor from file_util to base namespace.

chrome/installer/setup/install_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 <objbase.h>
 
 #include <string>
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
@@ skipping 58 matching lines @@
  protected:
   virtual void SetUp() OVERRIDE {
     EXPECT_EQ(S_OK, CoInitialize(NULL));
 
     dist_ = BrowserDistribution::GetDistribution();
     ASSERT_TRUE(dist_ != NULL);
     product_.reset(new installer::Product(dist_));
 
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
     chrome_exe_ = temp_dir_.path().Append(installer::kChromeExe);
-    EXPECT_EQ(0, file_util::WriteFile(chrome_exe_, "", 0));
+    EXPECT_EQ(0, base::WriteFile(chrome_exe_, "", 0));
 
     ShellUtil::ShortcutProperties chrome_properties(ShellUtil::CURRENT_USER);
     product_->AddDefaultShortcutProperties(chrome_exe_, &chrome_properties);
 
     expected_properties_.set_target(chrome_exe_);
     expected_properties_.set_icon(chrome_properties.icon,
                                   chrome_properties.icon_index);
     expected_properties_.set_app_id(chrome_properties.app_id);
     expected_properties_.set_description(chrome_properties.description);
     expected_properties_.set_dual_mode(false);
@@ skipping 342 matching lines @@
   installer::EscapeXmlAttributeValueInSingleQuotes(&val);
   ASSERT_STREQ(kExpectedEscapedVal, val.c_str());
 }
 
 TEST(EscapeXmlAttributeValueTest, DontEscapeNormalValue) {
   base::string16 val(L"Google Chrome");
   static const wchar_t kExpectedEscapedVal[] = L"Google Chrome";
   installer::EscapeXmlAttributeValueInSingleQuotes(&val);
   ASSERT_STREQ(kExpectedEscapedVal, val.c_str());
 }