Fixed browser crash when using Debug build:

chrome/renderer/chrome_content_renderer_client.cc

Index: chrome/renderer/chrome_content_renderer_client.cc
diff --git a/chrome/renderer/chrome_content_renderer_client.cc b/chrome/renderer/chrome_content_renderer_client.cc
index ebdfd13e42e5b4dc4114f4aee9eb769b110e54ce..4e495a0ce18d889e26dbb26061210e544bad8cd3 100644
--- a/chrome/renderer/chrome_content_renderer_client.cc
+++ b/chrome/renderer/chrome_content_renderer_client.cc
@@ -48,6 +48,7 @@
 #include "chrome/renderer/external_extension.h"
 #include "chrome/renderer/loadtimes_extension_bindings.h"
 #include "chrome/renderer/net/renderer_net_predictor.h"
+#include "chrome/renderer/net_benchmarking_extension.h"
 #include "chrome/renderer/page_click_tracker.h"
 #include "chrome/renderer/page_load_histograms.h"
 #include "chrome/renderer/pepper/chrome_ppapi_interfaces.h"
@@ -212,6 +213,7 @@ void ChromeContentRendererClient::RenderThreadStarted() {
   thread->RegisterExtension(extensions_v8::ExternalExtension::Get());
   thread->RegisterExtension(extensions_v8::LoadTimesExtension::Get());
   thread->RegisterExtension(extensions_v8::SearchBoxExtension::Get());
+  thread->RegisterExtension(extensions_v8::NetBenchmarkingExtension::Get());

[tonyg, 2013/01/24 22:00:29]

This exposes closeConnection() to the web platform by default. I don't think we
want to do that.

[Danh Nguyen, 2013/02/07 16:56:32]

Fixed.  I've added --enable-net-benchmarking for that purpose.

 
   CommandLine* command_line = CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(switches::kEnableBenchmarking))