Make base compile with no "using base::FilePath".

base/path_service.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/path_service.h"
 
 #ifdef OS_WIN
 #include <windows.h>
 #include <shellapi.h>
 #include <shlobj.h>
 #endif
 
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/hash_tables.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/synchronization/lock.h"
 
+using base::FilePath;
+
 namespace base {
   bool PathProvider(int key, FilePath* result);
 #if defined(OS_WIN)
   bool PathProviderWin(int key, FilePath* result);
 #elif defined(OS_MACOSX)
   bool PathProviderMac(int key, FilePath* result);
 #elif defined(OS_ANDROID)
   bool PathProviderAndroid(int key, FilePath* result);
 #elif defined(OS_POSIX)
   // PathProviderPosix is the default path provider on POSIX OSes other than
@@ skipping 295 matching lines @@
 
 // static
 void PathService::DisableCache() {
   PathData* path_data = GetPathData();
   DCHECK(path_data);
 
   base::AutoLock scoped_lock(path_data->lock);
   path_data->cache.clear();
   path_data->cache_disabled = true;
 }