diff --git a/brightray/browser/browser_context.h b/brightray/browser/browser_context.h
index 6356277942..b92deb75c5 100644
--- a/brightray/browser/browser_context.h
+++ b/brightray/browser/browser_context.h
@@ -22,7 +22,7 @@ class BrowserContext : public content::BrowserContext {
   BrowserContext();
   ~BrowserContext();
 
-  void Initialize();
+  virtual void Initialize();
 
   net::URLRequestContextGetter* CreateRequestContext(
       content::ProtocolHandlerMap*);