Add support for clearing the HTTP auth cache.

net/http/http_auth_cache.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_auth_cache.h"
 
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
 
@@ skipping 231 matching lines @@
       if (credentials.Equals(it->credentials())) {
         entries_.erase(it);
         return true;
       }
       return false;
     }
   }
   return false;
 }
 
+void HttpAuthCache::Clear() {
+  entries_.clear();
+}
+
 bool HttpAuthCache::UpdateStaleChallenge(const GURL& origin,
                                          const std::string& realm,
                                          HttpAuth::Scheme scheme,
                                          const std::string& auth_challenge) {
   HttpAuthCache::Entry* entry = Lookup(origin, realm, scheme);
   if (!entry)
     return false;
   entry->UpdateStaleChallenge(auth_challenge);
   entry->last_use_time_ = base::TimeTicks::Now();
   return true;
@@ skipping 10 matching lines @@
     // Copy all other paths.
     for (Entry::PathList::const_reverse_iterator it2 = ++it->paths_.rbegin();
          it2 != it->paths_.rend(); ++it2)
       entry->AddPath(*it2);
     // Copy nonce count (for digest authentication).
     entry->nonce_count_ = it->nonce_count_;
   }
 }
 
 }  // namespace net