base: Remove non-const refs from the MRUCache implementation.

net/http/disk_based_cert_cache.cc

 // Copyright (c) 2014 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/disk_based_cert_cache.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 482 matching lines @@
 void DiskBasedCertCache::ReadWorker::RunCallbacks() {
   for (std::vector<GetCallback>::const_iterator it = user_callbacks_.begin();
        it != user_callbacks_.end();
        ++it) {
     it->Run(cert_handle_);
   }
   user_callbacks_.clear();
 }
 
 void DiskBasedCertCache::CertFree::operator()(
-    X509Certificate::OSCertHandle cert_handle) {
-  X509Certificate::FreeOSCertHandle(cert_handle);
+    X509Certificate::OSCertHandle* cert_handle) {
+  X509Certificate::FreeOSCertHandle(*cert_handle);
 }
 
 DiskBasedCertCache::DiskBasedCertCache(disk_cache::Backend* backend)
     : backend_(backend),
       mru_cert_cache_(kMemoryCacheMaxSize),
       mem_cache_hits_(0),
       mem_cache_misses_(0),
       weak_factory_(this) {
   DCHECK(backend_);
 }
@@ skipping 80 matching lines @@
 
 void DiskBasedCertCache::FinishedWriteOperation(
     const std::string& key,
     X509Certificate::OSCertHandle cert_handle) {
   write_worker_map_.erase(key);
   if (!key.empty())
     mru_cert_cache_.Put(key, X509Certificate::DupOSCertHandle(cert_handle));
 }
 
 }  // namespace net