Fixed browser crash when using Debug build:

chrome/browser/chrome_benchmarking_message_filter.cc

Index: chrome/browser/chrome_benchmarking_message_filter.cc
diff --git a/chrome/browser/chrome_benchmarking_message_filter.cc b/chrome/browser/chrome_benchmarking_message_filter.cc
index 5be4df1abc3d10747f780f65037c2453eba58e6b..4da5ed6367715f4cd766c4f3cc140fcef2b73ce9 100644
--- a/chrome/browser/chrome_benchmarking_message_filter.cc
+++ b/chrome/browser/chrome_benchmarking_message_filter.cc
@@ -49,8 +49,6 @@ bool ChromeBenchmarkingMessageFilter::OnMessageReceived(
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP_EX(ChromeBenchmarkingMessageFilter, message,
                            *message_was_ok)
-    IPC_MESSAGE_HANDLER(ChromeViewHostMsg_CloseCurrentConnections,
-                        OnCloseCurrentConnections)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(ChromeViewHostMsg_ClearCache, OnClearCache)
     IPC_MESSAGE_HANDLER(ChromeViewHostMsg_ClearHostResolverCache,
                         OnClearHostResolverCache)
@@ -119,17 +117,6 @@ void ChromeBenchmarkingMessageFilter::OnEnableSpdy(bool enable) {
   }
 }
 
-void ChromeBenchmarkingMessageFilter::OnCloseCurrentConnections() {
-  // This function is disabled unless the user has enabled
-  // benchmarking extensions.
-  if (!CheckBenchmarkingEnabled()) {
-    NOTREACHED() << "Received unexpected benchmarking IPC";
-    return;
-  }
-  request_context_->GetURLRequestContext()->
-      http_transaction_factory()->GetCache()->CloseAllConnections();
-}
-
 void ChromeBenchmarkingMessageFilter::OnSetCacheMode(bool enabled) {
   // This function is disabled unless the user has enabled
   // benchmarking extensions.