Add a gyp flag to enable dcheck by default in release without

net/http/http_cache_unittest.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 "net/http/http_cache.h"
 
 #include "base/hash_tables.h"
 #include "base/memory/scoped_vector.h"
 #include "base/message_loop.h"
 #include "base/string_util.h"
@@ skipping 4085 matching lines @@
 
   RunTransactionTest(cache.http_cache(), transaction);
 
   EXPECT_EQ(2, cache.network_layer()->transaction_count());
   EXPECT_EQ(1, cache.disk_cache()->open_count());
   EXPECT_EQ(1, cache.disk_cache()->create_count());
 
   RemoveMockTransaction(&transaction);
 }
 
-#ifdef NDEBUG
+#if defined(NDEBUG) && !defined(DCHECK_ALWAYS_ON)
 // This test hits a NOTREACHED so it is a release mode only test.
 TEST(HttpCache, RangeGET_OK_LoadOnlyFromCache) {
   MockHttpCache cache;
   AddMockTransaction(&kRangeGET_TransactionOK);
 
   // Write to the cache (40-49).
   RunTransactionTest(cache.http_cache(), kRangeGET_TransactionOK);
   EXPECT_EQ(1, cache.network_layer()->transaction_count());
   EXPECT_EQ(0, cache.disk_cache()->open_count());
   EXPECT_EQ(1, cache.disk_cache()->create_count());
@@ skipping 1096 matching lines @@
       new net::DiskCacheBasedSSLHostInfo("https://www.verisign.com", ssl_config,
                                          &cert_verifier, cache.http_cache());
   ssl_host_info->Start();
   DeleteSSLHostInfoCompletionCallback callback(ssl_host_info);
   int rv = ssl_host_info->WaitForDataReady(&callback);
   EXPECT_EQ(net::ERR_IO_PENDING, rv);
   // Now complete the backend creation and let the callback run.
   factory->FinishCreation();
   EXPECT_EQ(net::OK, callback.GetResult(rv));
 }