customtabs: Pre-create a renderer in mayLaunchUrl().

content/browser/frame_host/navigation_controller_android.h

Index: content/browser/frame_host/navigation_controller_android.h
diff --git a/content/browser/frame_host/navigation_controller_android.h b/content/browser/frame_host/navigation_controller_android.h
index 0d67d1c13c2b292cd22c474adc9883f01ddf5ceb..1d9600ed8e737c6d93c26149ac9b077f00a501dc 100644
--- a/content/browser/frame_host/navigation_controller_android.h
+++ b/content/browser/frame_host/navigation_controller_android.h
@@ -60,7 +60,8 @@ class CONTENT_EXPORT NavigationControllerAndroid {
                jstring base_url_for_data_url,
                jstring virtual_url_for_data_url,
                jboolean can_load_local_resources,
-               jboolean is_renderer_initiated);
+               jboolean is_renderer_initiated,
+               jboolean should_replace_current_entry);
   void ClearSslPreferences(JNIEnv* env, jobject /* obj */);
   bool GetUseDesktopUserAgent(JNIEnv* env, jobject /* obj */);
   void SetUseDesktopUserAgent(JNIEnv* env,