Pass referer on download requests

Bug: 6662557
Change-Id: Ib7fdc4b3f1e0f7370631d8a222565faaee550bfb
diff --git a/src/com/android/browser/PreloadController.java b/src/com/android/browser/PreloadController.java
index a7feaee..881f19e 100644
--- a/src/com/android/browser/PreloadController.java
+++ b/src/com/android/browser/PreloadController.java
@@ -153,7 +153,7 @@
     @Override
     public void onDownloadStart(Tab tab, String url, String useragent,
                                     String contentDisposition, String mimeType,
-                                    long contentLength) {
+                                    String referer, long contentLength) {
         if (LOGD_ENABLED) Log.d(LOGTAG, "onDownloadStart()");
     }