Move PathExists to base namespace.

content/browser/storage_partition_impl_map.cc

Index: content/browser/storage_partition_impl_map.cc
diff --git a/content/browser/storage_partition_impl_map.cc b/content/browser/storage_partition_impl_map.cc
index 3750a723d55a6cb31fc20a4e290a86ea46ecfdb0..1915baf8efc270137c83c6272674c8462d33792a 100644
--- a/content/browser/storage_partition_impl_map.cc
+++ b/content/browser/storage_partition_impl_map.cc
@@ -259,7 +259,7 @@ void BlockingObliteratePath(
   // Early exit required because MakeAbsoluteFilePath() will fail on POSIX
   // if |unnormalized_root| does not exist. This is safe because there is
   // nothing to do in this situation anwyays.
-  if (!file_util::PathExists(unnormalized_root)) {
+  if (!base::PathExists(unnormalized_root)) {
     return;
   }
 
@@ -277,7 +277,7 @@ void BlockingObliteratePath(
   for (std::vector<base::FilePath>::const_iterator it = paths_to_keep.begin();
        it != paths_to_keep.end();
        ++it) {
-    if (root.IsParent(*it) && file_util::PathExists(*it))
+    if (root.IsParent(*it) && base::PathExists(*it))
       valid_paths_to_keep.push_back(*it);
   }