[HttpCache] LOAD_ONLY_FROM_CACHE should not imply LOAD_PREFERRING_CACHE

net/url_request/sdch_dictionary_fetcher.cc

 // Copyright 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/url_request/sdch_dictionary_fetcher.h"
 
 #include <stdint.h>
 #include <queue>
 #include <set>
 
@@ skipping 265 matching lines @@
   }
 
   next_state_ = STATE_SEND_REQUEST_PENDING;
 
   FetchInfo info;
   bool success = fetch_queue_->Pop(&info);
   DCHECK(success);
   current_request_ = context_->CreateRequest(info.url, IDLE, this);
   int load_flags = LOAD_DO_NOT_SEND_COOKIES | LOAD_DO_NOT_SAVE_COOKIES;
   if (info.cache_only)
-    load_flags |= LOAD_ONLY_FROM_CACHE;
+    load_flags |= LOAD_ONLY_FROM_CACHE | LOAD_SKIP_CACHE_VALIDATION;
   current_request_->SetLoadFlags(load_flags);
 
   buffer_ = new IOBuffer(kBufferSize);
   dictionary_.reset(new std::string());
   current_callback_ = info.callback;
 
   current_request_->Start();
   current_request_->net_log().AddEvent(NetLogEventType::SDCH_DICTIONARY_FETCH);
 
   return ERR_IO_PENDING;
@@ skipping 73 matching lines @@
                           current_request_->net_log(),
                           current_request_->was_cached());
   }
 
   ResetRequest();
   next_state_ = STATE_SEND_REQUEST;
   return OK;
 }
 
 }  // namespace net