Fixes the cache lock issue.

chrome/browser/devtools/devtools_network_transaction.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 "chrome/browser/devtools/devtools_network_transaction.h"
 
 #include <utility>
 
 #include "base/callback_helpers.h"
 #include "chrome/browser/devtools/devtools_network_controller.h"
@@ skipping 27 matching lines @@
     interceptor_->StopThrottle(throttle_callback_);
 }
 
 void DevToolsNetworkTransaction::IOCallback(
     const net::CompletionCallback& callback, bool start, int result) {
   result = Throttle(callback, start, result);
   if (result != net::ERR_IO_PENDING)
     callback.Run(result);
 }
 
+void DevToolsNetworkTransaction::Orphan(
+    std::unique_ptr<HttpTransaction> trans) {
+  NOTREACHED();
+  return;
+}
+
 int DevToolsNetworkTransaction::Throttle(
     const net::CompletionCallback& callback, bool start, int result) {
   if (failed_)
     return net::ERR_INTERNET_DISCONNECTED;
   if (!interceptor_ || result < 0)
     return result;
 
   base::TimeTicks send_end;
   if (start) {
     throttled_byte_count_ += network_transaction_->GetTotalReceivedBytes();
@@ skipping 233 matching lines @@
   if (CheckFailed())
     return net::ERR_INTERNET_DISCONNECTED;
   return network_transaction_->ResumeNetworkStart();
 }
 
 void
 DevToolsNetworkTransaction::GetConnectionAttempts(net::ConnectionAttempts* out)
 const {
   network_transaction_->GetConnectionAttempts(out);
 }