Replace FilePath with base::FilePath in some more top level directories.

rlz/mac/lib/rlz_value_store_mac.mm

Index: rlz/mac/lib/rlz_value_store_mac.mm
diff --git a/rlz/mac/lib/rlz_value_store_mac.mm b/rlz/mac/lib/rlz_value_store_mac.mm
index 6b8e6f415b3d4c71e08c3b9599db75f827dba2cd..9601d4cf86022dcdbe5d8c0facd6f2d97d3dcc18 100644
--- a/rlz/mac/lib/rlz_value_store_mac.mm
+++ b/rlz/mac/lib/rlz_value_store_mac.mm
@@ -275,7 +275,7 @@ NSString* RlzLockFilename() {
 
 ScopedRlzValueStoreLock::ScopedRlzValueStoreLock() {
   bool got_distributed_lock = g_recursive_lock.TryGetCrossProcessLock(
-      FilePath([RlzLockFilename() fileSystemRepresentation]));
+      base::FilePath([RlzLockFilename() fileSystemRepresentation]));
   // At this point, we hold the in-process lock, no matter the value of
   // |got_distributed_lock|.
 
@@ -349,7 +349,7 @@ RlzValueStore* ScopedRlzValueStoreLock::GetStore() {
 
 namespace testing {
 
-void SetRlzStoreDirectory(const FilePath& directory) {
+void SetRlzStoreDirectory(const base::FilePath& directory) {
   base::mac::ScopedNSAutoreleasePool pool;
 
   [g_test_folder release];