Add a force pipelining option to load flags.

net/http/http_network_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_network_transaction.h"
 
 #include <set>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 1190 matching lines @@
     case ERR_SOCKET_NOT_CONNECTED:
       if (ShouldResendRequest(error)) {
         net_log_.AddEvent(
             NetLog::TYPE_HTTP_TRANSACTION_RESTART_AFTER_ERROR,
             make_scoped_refptr(new NetLogIntegerParameter("net_error", error)));
         ResetConnectionAndRequestForResend();
         error = OK;
       }
       break;
     case ERR_PIPELINE_EVICTION:
+      if (!(request_->load_flags & LOAD_FORCE_HTTP_PIPELINING)) {
+        net_log_.AddEvent(
+            NetLog::TYPE_HTTP_TRANSACTION_RESTART_AFTER_ERROR,
+            make_scoped_refptr(new NetLogIntegerParameter("net_error", error)));
+        ResetConnectionAndRequestForResend();
+        error = OK;
+      }
+      break;
     case ERR_SPDY_PING_FAILED:
     case ERR_SPDY_SERVER_REFUSED_STREAM:
       net_log_.AddEvent(
           NetLog::TYPE_HTTP_TRANSACTION_RESTART_AFTER_ERROR,
           make_scoped_refptr(new NetLogIntegerParameter("net_error", error)));
       ResetConnectionAndRequestForResend();
       error = OK;
       break;
   }
   return error;
@@ skipping 131 matching lines @@
       description = base::StringPrintf("Unknown state 0x%08X (%u)", state,
                                        state);
       break;
   }
   return description;
 }
 
 #undef STATE_CASE
 
 }  // namespace net