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

webkit/glue/webfileutilities_impl.cc

Index: webkit/glue/webfileutilities_impl.cc
diff --git a/webkit/glue/webfileutilities_impl.cc b/webkit/glue/webfileutilities_impl.cc
index 124919024ce1b2080721ef46d4c35e0456b88905..3ad3b3d78947a51e686311a41f588d5ea2f764ca 100644
--- a/webkit/glue/webfileutilities_impl.cc
+++ b/webkit/glue/webfileutilities_impl.cc
@@ -74,7 +74,7 @@ bool WebFileUtilitiesImpl::makeAllDirectories(const WebString& path) {
 }
 
 bool WebFileUtilitiesImpl::isDirectory(const WebString& path) {
-  return file_util::DirectoryExists(base::FilePath::FromUTF16Unsafe(path));
+  return base::DirectoryExists(base::FilePath::FromUTF16Unsafe(path));
 }
 
 WebKit::WebURL WebFileUtilitiesImpl::filePathToURL(const WebString& path) {