Move path functions from file_util to FilePath object.

chrome/common/extensions/extension_file_util.cc

Index: chrome/common/extensions/extension_file_util.cc
diff --git a/chrome/common/extensions/extension_file_util.cc b/chrome/common/extensions/extension_file_util.cc
index 4c2fbb00783500b17dc3a91adca890e73b2caab6..dea37d465ac1e68db73ab8fedbc1c5ad821d74f7 100644
--- a/chrome/common/extensions/extension_file_util.cc
+++ b/chrome/common/extensions/extension_file_util.cc
@@ -492,11 +492,11 @@ base::FilePath ExtensionResourceURLToFilePath(const GURL& url,
     return base::FilePath();
 
   base::FilePath path = root.AppendASCII(host).Append(relative_path);
-  if (!file_util::PathExists(path) ||
-      !file_util::AbsolutePath(&path) ||
-      !root.IsParent(path)) {
+  if (!file_util::PathExists(path))
+    return base::FilePath();
+  path = path.AsAbsolute();
+  if (path.empty() || !root.IsParent(path))
     return base::FilePath();
-  }
   return path;
 }