Add |extra_info| parameter for browser creation (fixes issue #1088)

The optional |extra_info| parameter provides an opportunity to specify extra
information specific to the created browser that will be passed to
CefRenderProcessHandler::OnBrowserCreated() in the render process.

tests/cefclient/browser/osr_window_win.h

@@ -52,6 +52,7 @@ class OsrWindowWin
                      const RECT& rect,
                      CefRefPtr<CefClient> handler,
                      const CefBrowserSettings& settings,
+                     CefRefPtr<CefDictionaryValue> extra_info,
                      CefRefPtr<CefRequestContext> request_context,
                      const std::string& startup_url);