Simple Cache Perftests: properly restore FD limit.

net/disk_cache/disk_cache_perftest.cc

 // Copyright (c) 2011 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 <limits>
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/files/file_enumerator.h"
@@ skipping 44 matching lines @@
 
 class DiskCachePerfTest : public DiskCacheTestWithCache {
  public:
   DiskCachePerfTest() : saved_fd_limit_(MaybeGetMaxFds()) {
     if (saved_fd_limit_ < kFdLimitForCacheTests)
       MaybeSetFdLimit(kFdLimitForCacheTests);
   }
 
   ~DiskCachePerfTest() override {
     if (saved_fd_limit_ < kFdLimitForCacheTests)
-      MaybeSetFdLimit(kFdLimitForCacheTests);
+      MaybeSetFdLimit(saved_fd_limit_);
   }
 
  protected:
   enum class WhatToRead {
     HEADERS_ONLY,
     HEADERS_AND_BODY,
   };
 
   // Helper methods for constructing tests.
   bool TimeWrite();
@@ skipping 223 matching lines @@
     files.DeleteBlock(address[entry], false);
     EXPECT_TRUE(
         files.CreateBlock(disk_cache::RANKINGS, block_size, &address[entry]));
   }
 
   timer2.Done();
   base::RunLoop().RunUntilIdle();
 }
 
 }  // namespace