Revert 152360 - Disk cache: Disable checking the lists on start-up.

net/disk_cache/backend_impl.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 "net/disk_cache/backend_impl.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
@@ skipping 468 matching lines @@
 
   eviction_.Init(this);
 
   // stats_ and rankings_ may end up calling back to us so we better be enabled.
   disabled_ = false;
   if (!stats_.Init(this, &data_->header.stats))
     return net::ERR_FAILED;
 
   disabled_ = !rankings_.Init(this, new_eviction_);
 
+  if (!disabled_ && !(user_flags_ & kNoRandom) && base::RandInt(0, 99) < 2)
+    rankings_.SelfCheck();  // Ignore return value for now.
+
 #if defined(STRESS_CACHE_EXTENDED_VALIDATION)
   trace_object_->EnableTracing(false);
   int sc = SelfCheck();
   if (sc < 0 && sc != ERR_NUM_ENTRIES_MISMATCH)
     NOTREACHED();
   trace_object_->EnableTracing(true);
 #endif
 
   if (previous_crash) {
     ReportError(ERR_PREVIOUS_CRASH);
@@ skipping 1700 matching lines @@
     if (total_memory > kMaxBuffersSize || total_memory <= 0)
       total_memory = kMaxBuffersSize;
 
     done = true;
   }
 
   return static_cast<int>(total_memory);
 }
 
 }  // namespace disk_cache