Add rendering support to the TestShell.

chrome/browser/chrome_content_browser_client.cc

Index: chrome/browser/chrome_content_browser_client.cc
diff --git a/chrome/browser/chrome_content_browser_client.cc b/chrome/browser/chrome_content_browser_client.cc
index 0ee484c8bba3d5f73d2596c45efa6fb3f3816859..298b09d97d886667b807c712a58f2fc4e1246537 100644
--- a/chrome/browser/chrome_content_browser_client.cc
+++ b/chrome/browser/chrome_content_browser_client.cc
@@ -785,10 +785,12 @@ void ChromeContentBrowserClient::AppendExtraCommandLineSwitches(
     if (process) {
       Profile* profile = Profile::FromBrowserContext(
           process->GetBrowserContext());
-      extensions::ProcessMap* process_map =
-          profile->GetExtensionService()->process_map();
-      if (process_map && process_map->Contains(process->GetID()))
-        command_line->AppendSwitch(switches::kExtensionProcess);
+      if (profile->GetExtensionService()) {
+        extensions::ProcessMap* process_map =
+            profile->GetExtensionService()->process_map();
+        if (process_map && process_map->Contains(process->GetID()))
+          command_line->AppendSwitch(switches::kExtensionProcess);
+      }
 
       PrefService* prefs = profile->GetPrefs();
       // Currently this pref is only registered if applied via a policy.