Start migrating the disk cache to using FilePath.

net/disk_cache/disk_cache_test_base.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef NET_DISK_CACHE_DISK_CACHE_TEST_BASE_H_
 #define NET_DISK_CACHE_DISK_CACHE_TEST_BASE_H_
 
 #include "base/basictypes.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
+class FilePath;
+
 namespace disk_cache {
 
 class Backend;
 class BackendImpl;
 class MemBackendImpl;
 
 }  // namespace disk_cache
 
 // These tests can use the path service, which uses autoreleased objects on the
 // Mac, so this needs to be a PlatformTest.  Even tests that do not require a
@@ skipping 61 matching lines @@
   bool force_creation_;
   bool new_eviction_;
   bool first_cleanup_;
   bool integrity_;
   // This is intentionally left uninitialized, to be used by any test.
   bool success_;
 
  private:
   void InitMemoryCache();
   void InitDiskCache();
-  void InitDiskCacheImpl(const std::wstring& path);
+  void InitDiskCacheImpl(const FilePath& path);
 };
 
 #endif  // NET_DISK_CACHE_DISK_CACHE_TEST_BASE_H_