Fix HTTPCacheTransaction conditionalization header check.

net/http/http_cache_transaction.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/http/http_cache_transaction.h"
 
 #include "build/build_config.h"
 
 #if defined(OS_POSIX)
 #include <unistd.h>
@@ skipping 1626 matching lines @@
     const ValidationHeaderInfo& info = kValidationHeaders[i];
     std::string validation_value;
     if (request_->extra_headers.GetHeader(
             info.request_header_name, &validation_value)) {
       if (!external_validation_.values[i].empty() ||
           validation_value.empty()) {
         external_validation_error = true;
       }
       external_validation_.values[i] = validation_value;
       external_validation_.initialized = true;
-      break;
     }
   }
 
   // We don't support ranges and validation headers.
   if (range_found && external_validation_.initialized) {
     LOG(WARNING) << "Byte ranges AND validation headers found.";
     effective_load_flags_ |= LOAD_DISABLE_CACHE;
   }
 
   // If there is more than one validation header, we can't treat this request as
@@ skipping 850 matching lines @@
 }
 
 int HttpCache::Transaction::ResetCacheIOStart(int return_value) {
   DCHECK(cache_io_start_.is_null());
   if (return_value == ERR_IO_PENDING)
     cache_io_start_ = base::TimeTicks::Now();
   return return_value;
 }
 
 }  // namespace net