Fix Simple Cache race on multiple dooms in flight.

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/metrics/field_trial.h"
 #include "base/port.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 3192 matching lines @@
 TEST_F(DiskCacheBackendTest, SimpleDoomRecent) {
   SetSimpleCacheMode();
   BackendDoomRecent();
 }
 
 TEST_F(DiskCacheBackendTest, SimpleDoomBetween) {
   SetSimpleCacheMode();
   BackendDoomBetween();
 }
 
-// See http://crbug.com/237450.
-// TODO(gavinp): Consider enabling this test again when
-// https://codereview.chromium.org/23823002/ lands.
-TEST_F(DiskCacheBackendTest, DISABLED_SimpleCacheDoomAll) {
+TEST_F(DiskCacheBackendTest, SimpleCacheDoomAll) {
   SetSimpleCacheMode();
   BackendDoomAll();
 }
 
 TEST_F(DiskCacheBackendTest, FLAKY_SimpleCacheAppCacheOnlyDoomAll) {
   SetCacheType(net::APP_CACHE);
   SetSimpleCacheMode();
   BackendDoomAll();
 }
 
@@ skipping 240 matching lines @@
   void* iter = NULL;
   size_t count = 0;
   ASSERT_TRUE(EnumerateAndMatchKeys(-1, &iter, &keys_to_match, &count));
   cache_->EndEnumeration(&iter);
 
   EXPECT_EQ(key_pool.size(), count);
   EXPECT_TRUE(keys_to_match.empty());
 }
 
 #endif  // !defined(OS_WIN)