Move PathExists to base namespace.

chrome/browser/prefs/chrome_pref_service_unittest.cc

Index: chrome/browser/prefs/chrome_pref_service_unittest.cc
diff --git a/chrome/browser/prefs/chrome_pref_service_unittest.cc b/chrome/browser/prefs/chrome_pref_service_unittest.cc
index 801ca674d7b13715911f4d3949d06b2d84474e5f..683ffa54417b10ed07d3912ee92c6fd894078729 100644
--- a/chrome/browser/prefs/chrome_pref_service_unittest.cc
+++ b/chrome/browser/prefs/chrome_pref_service_unittest.cc
@@ -67,7 +67,7 @@ class ChromePrefServiceUserFilePrefsTest : public testing::Test {
 
     ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &data_dir_));
     data_dir_ = data_dir_.AppendASCII("pref_service");
-    ASSERT_TRUE(file_util::PathExists(data_dir_));
+    ASSERT_TRUE(base::PathExists(data_dir_));
   }
 
   void ClearListValue(PrefService* prefs, const char* key) {
@@ -137,7 +137,7 @@ TEST_F(ChromePrefServiceUserFilePrefsTest, PreserveEmptyValue) {
   // Compare to expected output.
   base::FilePath golden_output_file =
       data_dir_.AppendASCII("write.golden.need_empty_value.json");
-  ASSERT_TRUE(file_util::PathExists(golden_output_file));
+  ASSERT_TRUE(base::PathExists(golden_output_file));
   EXPECT_TRUE(file_util::TextContentsEqual(golden_output_file, pref_file));
 }