Fix single process mode in content_shell.

content/browser/browser_main_runner.cc

Index: content/browser/browser_main_runner.cc
===================================================================
--- content/browser/browser_main_runner.cc	(revision 132841)
+++ content/browser/browser_main_runner.cc	(working copy)
@@ -13,6 +13,7 @@
 #include "content/browser/browser_main_loop.h"
 #include "content/browser/notification_service_impl.h"
 #include "content/common/child_process.h"
+#include "content/public/browser/render_process_host.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
 
@@ -47,6 +48,9 @@
     if (parameters.command_line.HasSwitch(switches::kWaitForDebugger))
       ChildProcess::WaitForDebugger("Browser");
 
+    if (parameters.command_line.HasSwitch(switches::kSingleProcess))
+      content::RenderProcessHost::set_run_renderer_in_process(true);
+
     statistics_.reset(new base::StatisticsRecorder);
 
     notification_service_.reset(new NotificationServiceImpl);