Use proxy for downloads.

Use the new Proxy method getPreferredHttpHost to use proxy for
downloads.

Change-Id: I4224e29ba4b37bd570d84382764e08f9babe6530
diff --git a/src/com/android/browser/DownloadTouchIcon.java b/src/com/android/browser/DownloadTouchIcon.java
index b5369ae..14404ff 100644
--- a/src/com/android/browser/DownloadTouchIcon.java
+++ b/src/com/android/browser/DownloadTouchIcon.java
@@ -23,15 +23,18 @@
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.net.http.AndroidHttpClient;
+import android.net.Proxy;
 import android.os.AsyncTask;
 import android.provider.Browser;
 import android.webkit.WebView;
 
 
 import org.apache.http.HttpEntity;
+import org.apache.http.HttpHost;
 import org.apache.http.HttpResponse;
 import org.apache.http.client.methods.HttpGet;
 import org.apache.http.client.params.HttpClientParams;
+import org.apache.http.conn.params.ConnRouteParams;
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -43,10 +46,12 @@
     private final String mOriginalUrl;
     private final String mUrl;
     private final String mUserAgent;
+    private final BrowserActivity mActivity;
     /* package */ Tab mTab;
 
-    public DownloadTouchIcon(Tab tab, ContentResolver cr, WebView view) {
+    public DownloadTouchIcon(Tab tab, BrowserActivity activity, ContentResolver cr, WebView view) {
         mTab = tab;
+        mActivity = activity;
         mContentResolver = cr;
         // Store these in case they change.
         mOriginalUrl = view.getOriginalUrl();
@@ -56,6 +61,7 @@
 
     public DownloadTouchIcon(ContentResolver cr, String url) {
         mTab = null;
+        mActivity = null;
         mContentResolver = cr;
         mOriginalUrl = null;
         mUrl = url;
@@ -71,6 +77,11 @@
 
             AndroidHttpClient client = AndroidHttpClient.newInstance(
                     mUserAgent);
+            HttpHost httpHost = Proxy.getPreferredHttpHost(mActivity, url);
+            if (httpHost != null) {
+                ConnRouteParams.setDefaultProxy(client.getParams(), httpHost);
+            }
+
             HttpGet request = new HttpGet(url);
 
             // Follow redirects