Preloading support in browser

	   Apps like the QSB can request the browser to preload a
	   web page.
           - preloaded pages are not added to the browser history
	     if they'r not seen by the user
	   - when a request is received, a new tab is created for the
	     preloaded page, but not added to the tab list
 	   - upon receiving the view intent for the preloaded page
             the tab is added to the tab list, and shown
	   - if several pages are preloaded consecutively in the same tab,
             the back stack is cleared before it is displayed
           - preloaded pages use the main browser cookie jar, so pages that
             have never been viewed by the user can drop cookies

Change-Id: I9ed21f2c9560fda0ed042b460b73bb33988a2e8a
diff --git a/src/com/android/browser/WebViewController.java b/src/com/android/browser/WebViewController.java
index 018af99..175cbf8 100644
--- a/src/com/android/browser/WebViewController.java
+++ b/src/com/android/browser/WebViewController.java
@@ -17,6 +17,7 @@
 package com.android.browser;
 
 import android.app.Activity;
+import android.content.Context;
 import android.graphics.Bitmap;
 import android.net.Uri;
 import android.net.http.SslError;
@@ -36,6 +37,8 @@
  */
 public interface WebViewController {
 
+    Context getContext();
+
     Activity getActivity();
 
     TabControl getTabControl();
@@ -72,7 +75,7 @@
     void onDownloadStart(Tab tab, String url, String useragent, String contentDisposition,
             String mimeType, long contentLength);
 
-    void showCustomView(Tab tab, View view, int requestedOrientation, 
+    void showCustomView(Tab tab, View view, int requestedOrientation,
             WebChromeClient.CustomViewCallback callback);
 
     void hideCustomView();