Browser: Use ICS alert icon

Still using upscaled GB drawable in a few places.

Change-Id: I52471b10809117b5a68e8236dc320fde0da2c533
diff --git a/src/com/android/browser/HttpAuthenticationDialog.java b/src/com/android/browser/HttpAuthenticationDialog.java
index ac4119c..0c16632 100644
--- a/src/com/android/browser/HttpAuthenticationDialog.java
+++ b/src/com/android/browser/HttpAuthenticationDialog.java
@@ -128,7 +128,7 @@
 
         mDialog = new AlertDialog.Builder(mContext)
                 .setTitle(title)
-                .setIcon(android.R.drawable.ic_dialog_alert)
+                .setIconAttribute(android.R.attr.alertDialogIcon)
                 .setView(v)
                 .setPositiveButton(R.string.action, new DialogInterface.OnClickListener() {
                     public void onClick(DialogInterface dialog, int whichButton) {