Revert "Add support for "browser:" protocol"

This reverts commit c0272db15121ba10229bf9de6a4200f5e6e4c518.

Change-Id: I4395d4f85f7e80e53ce9e8bfa43abcf25f34c636
diff --git a/src/com/android/browser/Tab.java b/src/com/android/browser/Tab.java
index e18cb2a..a65fda5 100644
--- a/src/com/android/browser/Tab.java
+++ b/src/com/android/browser/Tab.java
@@ -229,7 +229,7 @@
         PageState(Context c, boolean incognito) {
             mIncognito = incognito;
             if (mIncognito) {
-                mOriginalUrl = mUrl = Controller.INCOGNITO_URI;
+                mOriginalUrl = mUrl = "chrome://incognito";
                 mTitle = c.getString(R.string.new_incognito_tab);
             } else {
                 mOriginalUrl = mUrl = "";
@@ -506,12 +506,7 @@
         public WebResourceResponse shouldInterceptRequest(WebView view,
                 String url) {
             //intercept if opening a new incognito tab - show the incognito welcome page
-
-            // show only incognito content and webview has private
-            // and cannot go back(only supported if explicit from UI )
-            if (view.isPrivateBrowsingEnabled() &&
-                !view.canGoBack() &&
-                url.startsWith(Controller.INCOGNITO_URI) ) {
+            if (url.startsWith("chrome://incognito")) {
                 Resources resourceHandle = mContext.getResources();
                 InputStream inStream = resourceHandle.openRawResource(
                         com.android.browser.R.raw.incognito_mode_start_page);