Add logging to CrossSiteResourceHandler and BufferedResourceHandler

content/browser/loader/buffered_resource_handler.cc

Index: content/browser/loader/buffered_resource_handler.cc
===================================================================
--- content/browser/loader/buffered_resource_handler.cc	(revision 251072)
+++ content/browser/loader/buffered_resource_handler.cc	(working copy)
@@ -333,6 +333,7 @@
       PluginServiceImpl::GetInstance()->GetPlugins(
           base::Bind(&BufferedResourceHandler::OnPluginsLoaded,
                      weak_ptr_factory_.GetWeakPtr()));
+      request()->LogBlockedBy("BufferedResourceHandler");
       *defer = true;
       return true;
     }
@@ -470,6 +471,7 @@
 
 void BufferedResourceHandler::OnPluginsLoaded(
     const std::vector<WebPluginInfo>& plugins) {
+  request()->LogUnblocked();
   bool defer = false;
   if (!ProcessResponse(&defer)) {
     controller()->Cancel();