Disk cache: Make sure that the CacheCreator captures the required arguments.

net/disk_cache/backend_unittest.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/basictypes.h"
 #include "base/file_util.h"
 #include "base/port.h"
 #include "base/string_util.h"
 #include "base/stringprintf.h"
 #include "base/third_party/dynamic_annotations/dynamic_annotations.h"
@@ skipping 1543 matching lines @@
 // Tests that the cache is properly restarted on recovery error.
 TEST_F(DiskCacheBackendTest, DeleteOld) {
   ASSERT_TRUE(CopyTestCache("wrong_version"));
   SetNewEviction();
   base::Thread cache_thread("CacheThread");
   ASSERT_TRUE(cache_thread.StartWithOptions(
                   base::Thread::Options(MessageLoop::TYPE_IO, 0)));
 
   net::TestCompletionCallback cb;
   bool prev = base::ThreadRestrictions::SetIOAllowed(false);
-  int rv = disk_cache::CreateCacheBackend(net::DISK_CACHE, cache_path_, 0, true,
+  base::FilePath path(cache_path_);
+  int rv = disk_cache::CreateCacheBackend(net::DISK_CACHE, path, 0, true,
                                           cache_thread.message_loop_proxy(),
                                           NULL, &cache_, cb.callback());
+  path.clear();  // Make sure path was captured by the previous call.
   ASSERT_EQ(net::OK, cb.GetResult(rv));
   base::ThreadRestrictions::SetIOAllowed(prev);
   delete cache_;
   cache_ = NULL;
   EXPECT_TRUE(CheckCacheIntegrity(cache_path_, new_eviction_, mask_));
 }
 
 // We want to be able to deal with messed up entries on disk.
 void DiskCacheBackendTest::BackendInvalidEntry2() {
   ASSERT_TRUE(CopyTestCache("bad_entry"));
@@ skipping 1188 matching lines @@
   disk_cache::SimpleFileHeader header;
   header.initial_magic_number = GG_UINT64_C(0xbadf00d);
   EXPECT_EQ(
       implicit_cast<int>(sizeof(header)),
       file_util::WriteFile(entry_file1_path, reinterpret_cast<char*>(&header),
                            sizeof(header)));
   ASSERT_EQ(net::ERR_FAILED, OpenEntry(key, &entry));
 }
 
 #endif  // !defined(OS_WIN)