Implement FTP auth through proxy

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/string_util.h"
 
 namespace {
@@ skipping 24 matching lines @@
 // |container| an ancestor of |path|?
 bool IsEnclosingPath(const std::string& container, const std::string& path) {
   DCHECK(container.empty() || *(container.end() - 1) == '/');
   return ((container.empty() && path.empty()) ||
           (!container.empty() && StartsWithASCII(path, container, true)));
 }
 
 // Debug helper to check that |origin| arguments are properly formed.
 void CheckOriginIsValid(const GURL& origin) {
   DCHECK(origin.is_valid());
-  DCHECK(origin.SchemeIs("http") || origin.SchemeIs("https"));
+  // Note that the scheme may be FTP when we're using a HTTP proxy.
+  DCHECK(origin.SchemeIs("http") || origin.SchemeIs("https") ||
+         origin.SchemeIs("ftp"));
   DCHECK(origin.GetOrigin() == origin);
 }
 
 // Functor used by remove_if.
 struct IsEnclosedBy {
   explicit IsEnclosedBy(const std::string& path) : path(path) { }
   bool operator() (const std::string& x) const {
     return IsEnclosingPath(path, x);
   }
   const std::string& path;
@@ skipping 177 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