Run the disk cache tests in scoped temporary directories instead of a fixed directory so that they …

net/disk_cache/stress_cache.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.
 
 // 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 83 matching lines @@
   key[size - 1] = '\0';
   return std::string(key);
 }
 
 // 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 = 0x2000000;  // 32MB.
   uint32 mask = 0xfff;  // 4096 entries.
-  FilePath path = GetCacheFilePath().InsertBeforeExtensionASCII("_stress");
+
+  FilePath path;
+  PathService::Get(base::DIR_TEMP, &path);
+  path = path.AppendASCII("cache_test_stress");
 
   base::Thread cache_thread("CacheThread");
   if (!cache_thread.StartWithOptions(
           base::Thread::Options(MessageLoop::TYPE_IO, 0)))
     return;
 
   disk_cache::BackendImpl* cache =
       new disk_cache::BackendImpl(path, mask, cache_thread.message_loop_proxy(),
                                   NULL);
   cache->SetMaxSize(cache_size);
@@ skipping 163 matching lines @@
   long int iteration = strtol(argv[1], &end, 0);
 
   if (!StartCrashThread()) {
     printf("failed to start thread\n");
     return kError;
   }
 
   StressTheCache(iteration);
   return 0;
 }