Start migrating the disk cache to using FilePath.

net/disk_cache/stress_cache.cc

 // 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.
 
 // This is a simple application that stress-tests the crash recovery of the disk
 // cache. The main application starts a copy of itself on a loop, checking the
 // exit code of the child process. When the child dies in an unexpected way,
 // the main application quits.
 
 // The child application has two threads: one to exercise the cache in an
@@ skipping 60 matching lines @@
 
 // -----------------------------------------------------------------------
 
 // This thread will loop forever, adding and removing entries from the cache.
 // iteration is the current crash cycle, so the entries on the cache are marked
 // to know which instance of the application wrote them.
 void StressTheCache(int iteration) {
   int cache_size = 0x800000;  // 8MB
   std::wstring path = GetCachePath();
   path.append(L"_stress");
-  disk_cache::BackendImpl* cache = new disk_cache::BackendImpl(path);
+  disk_cache::BackendImpl* cache =
+      new disk_cache::BackendImpl(FilePath::FromWStringHack(path));
   cache->SetFlags(disk_cache::kNoLoadProtection | disk_cache::kNoRandom);
   cache->SetMaxSize(cache_size);
   cache->SetType(net::DISK_CACHE);
   if (!cache->Init()) {
     printf("Unable to initialize cache.\n");
     return;
   }
   printf("Iteration %d, initial entries: %d\n", iteration,
          cache->GetEntryCount());
 
@@ skipping 107 matching lines @@
   long int iteration = strtol(argv[1], &end, 0);
 
   if (!StartCrashThread()) {
     printf("failed to start thread\n");
     return kError;
   }
 
   StressTheCache(iteration);
   return 0;
 }