Move path functions from file_util to FilePath object.

base/test/test_file_util_posix.cc

Index: base/test/test_file_util_posix.cc
diff --git a/base/test/test_file_util_posix.cc b/base/test/test_file_util_posix.cc
index 6be1c82e39d27a6f0d07f1e9eef3504d433253af..5be963ec119112efa22f37cb48c01334e071470d 100644
--- a/base/test/test_file_util_posix.cc
+++ b/base/test/test_file_util_posix.cc
@@ -90,11 +90,12 @@ bool CopyRecursiveDirNoCache(const base::FilePath& source_dir,
   // This function does not properly handle destinations within the source
   base::FilePath real_to_path = dest_dir;
   if (PathExists(real_to_path)) {
-    if (!AbsolutePath(&real_to_path))
+    real_to_path = MakeAbsoluteFilePath(real_to_path);
+    if (real_to_path.empty())
       return false;
   } else {
-    real_to_path = real_to_path.DirName();
-    if (!AbsolutePath(&real_to_path))
+    real_to_path = MakeAbsoluteFilePath(real_to_path.DirName());
+    if (real_to_path.empty())
       return false;
   }
   if (real_to_path.value().compare(0, source_dir.value().size(),