fix incognito url loading

    http://b/issue?id=3349090
    load "browser:incognito" explicitely when
    opening new incognito tab

Change-Id: I3929605479a0869bd9361664e1ea1ee7c9476fc7
diff --git a/src/com/android/browser/Controller.java b/src/com/android/browser/Controller.java
index 6113e54..3131ba7 100644
--- a/src/com/android/browser/Controller.java
+++ b/src/com/android/browser/Controller.java
@@ -2124,7 +2124,8 @@
     public Tab openIncognitoTab() {
         if (mTabControl.canCreateNewTab()) {
             Tab currentTab = mTabControl.getCurrentTab();
-            Tab tab = mTabControl.createNewTab(false, null, null, true);
+            Tab tab = mTabControl.createNewTab(false, null,
+                    "browser:incognito", true);
             addTab(tab);
             setActiveTab(tab);
             return tab;