Move PathIsWritable, DirectoryExists, ContentsEqual, and TextContentsEqual to the base namespace.

chrome/browser/prefs/chrome_pref_service_unittest.cc

 // Copyright (c) 2013 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/command_line.h"
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_registry_simple.h"
@@ skipping 120 matching lines @@
   ClearDictionaryValue(prefs.get(), "dict_needs_empty_value");
 
   // Write to file.
   prefs->CommitPendingWrite();
   message_loop_.RunUntilIdle();
 
   // Compare to expected output.
   base::FilePath golden_output_file =
       data_dir_.AppendASCII("write.golden.need_empty_value.json");
   ASSERT_TRUE(base::PathExists(golden_output_file));
-  EXPECT_TRUE(file_util::TextContentsEqual(golden_output_file, pref_file));
+  EXPECT_TRUE(base::TextContentsEqual(golden_output_file, pref_file));
 }
 
 class ChromePrefServiceWebKitPrefs : public ChromeRenderViewHostTestHarness {
  protected:
   virtual void SetUp() {
     ChromeRenderViewHostTestHarness::SetUp();
 
     // Supply our own profile so we use the correct profile data. The test
     // harness is not supposed to overwrite a profile if it's already created.
 
@@ skipping 34 matching lines @@
   const char kDefaultFont[] = "Times";
 #elif defined(OS_CHROMEOS)
   const char kDefaultFont[] = "Tinos";
 #else
   const char kDefaultFont[] = "Times New Roman";
 #endif
   EXPECT_EQ(ASCIIToUTF16(kDefaultFont),
             webkit_prefs.standard_font_family_map[prefs::kWebKitCommonScript]);
   EXPECT_TRUE(webkit_prefs.javascript_enabled);
 }