move subwindow handling to UI

     added sub view creation to WebViewFactory
     removed WebView from subview layout
     use WebVIewFactory for creating the SubWebView
     moved layout/view related code to UI

Change-Id: Id5b1905e4c36814fe7cc047cbd97128235d7e65e
diff --git a/src/com/android/browser/WebViewController.java b/src/com/android/browser/WebViewController.java
index fdd8ab1..8c99c58 100644
--- a/src/com/android/browser/WebViewController.java
+++ b/src/com/android/browser/WebViewController.java
@@ -39,6 +39,10 @@
 
     TabControl getTabControl();
 
+    WebViewFactory getWebViewFactory();
+
+    void createSubWindow(Tab tab);
+
     void onPageStarted(Tab tab, WebView view, String url, Bitmap favicon);
 
     void onPageFinished(Tab tab, String url);