Move PathExists to base namespace.

chrome/test/base/ui_test_utils.cc

Index: chrome/test/base/ui_test_utils.cc
diff --git a/chrome/test/base/ui_test_utils.cc b/chrome/test/base/ui_test_utils.cc
index 61f8b269eb5eaecb8baed8944d85904e0da98bd1..6fe7fecbbf33076882c346340e1cff9a57b60d88 100644
--- a/chrome/test/base/ui_test_utils.cc
+++ b/chrome/test/base/ui_test_utils.cc
@@ -109,14 +109,14 @@ base::FilePath GetSnapshotFileName(const base::FilePath& snapshot_directory) {
       the_time.hour, the_time.minute, the_time.second, kSnapshotExtension));
 
   base::FilePath snapshot_file = snapshot_directory.AppendASCII(filename);
-  if (file_util::PathExists(snapshot_file)) {
+  if (base::PathExists(snapshot_file)) {
     int index = 0;
     std::string suffix;
     base::FilePath trial_file;
     do {
       suffix = base::StringPrintf(" (%d)", ++index);
       trial_file = snapshot_file.InsertBeforeExtensionASCII(suffix);
-    } while (file_util::PathExists(trial_file));
+    } while (base::PathExists(trial_file));
     snapshot_file = trial_file;
   }
   return snapshot_file;