Fixed browser crash when using Debug build:

chrome/browser/chrome_net_benchmarking_message_filter.cc

Index: chrome/browser/chrome_net_benchmarking_message_filter.cc
diff --git a/chrome/browser/chrome_net_benchmarking_message_filter.cc b/chrome/browser/chrome_net_benchmarking_message_filter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0c3b7264e45eb38689e16c886fd4c80f53ad1127
--- /dev/null
+++ b/chrome/browser/chrome_net_benchmarking_message_filter.cc
@@ -0,0 +1,34 @@
+// Copyright (c) 2013 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/chrome_net_benchmarking_message_filter.h"
+
+#include "chrome/browser/net/chrome_url_request_context.h"
+#include "chrome/common/benchmarking_messages.h"
+#include "net/http/http_cache.h"
+
+ChromeNetBenchmarkingMessageFilter::ChromeNetBenchmarkingMessageFilter(
+    net::URLRequestContextGetter* request_context)
+    : request_context_(request_context) {
+}
+
+ChromeNetBenchmarkingMessageFilter::~ChromeNetBenchmarkingMessageFilter() {
+}
+
+bool ChromeNetBenchmarkingMessageFilter::OnMessageReceived(
+    const IPC::Message& message, bool* message_was_ok) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP_EX(ChromeNetBenchmarkingMessageFilter, message,
+                           *message_was_ok)
+    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_CloseCurrentConnections,
+                        OnCloseCurrentConnections)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP_EX()
+  return handled;
+}
+
+void ChromeNetBenchmarkingMessageFilter::OnCloseCurrentConnections() {
+  request_context_->GetURLRequestContext()->
+      http_transaction_factory()->GetCache()->CloseAllConnections();
+}