Add base:: qualifiers for FilePath uses.

rlz/chromeos/lib/rlz_value_store_chromeos.cc

Index: rlz/chromeos/lib/rlz_value_store_chromeos.cc
diff --git a/rlz/chromeos/lib/rlz_value_store_chromeos.cc b/rlz/chromeos/lib/rlz_value_store_chromeos.cc
index 31577ccf4b29e6c9f2b57d4f20a9d4b9ca9d2bc8..47e32d1297310f04f4c554cb23f3b5d678a8ca9a 100644
--- a/rlz/chromeos/lib/rlz_value_store_chromeos.cc
+++ b/rlz/chromeos/lib/rlz_value_store_chromeos.cc
@@ -42,17 +42,17 @@ const base::FilePath::CharType kRLZLockFileName[] =
     FILE_PATH_LITERAL("RLZ Data.lock");
 
 // RLZ store path for testing.
-FilePath g_testing_rlz_store_path_;
+base::FilePath g_testing_rlz_store_path_;
 
 // Returns file path of the RLZ storage.
-FilePath GetRlzStorePath() {
+base::FilePath GetRlzStorePath() {
   return g_testing_rlz_store_path_.empty() ?
       file_util::GetHomeDir().Append(kRLZDataFileName) :
       g_testing_rlz_store_path_.Append(kRLZDataFileName);
 }
 
 // Returns file path of the RLZ storage lock file.
-FilePath GetRlzStoreLockPath() {
+base::FilePath GetRlzStoreLockPath() {
   return g_testing_rlz_store_path_.empty() ?
       file_util::GetHomeDir().Append(kRLZLockFileName) :
       g_testing_rlz_store_path_.Append(kRLZLockFileName);