Add method to show distilled page prefs dialog

chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/DistilledPagePrefsView.java

Index: chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/DistilledPagePrefsView.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/DistilledPagePrefsView.java b/chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/DistilledPagePrefsView.java
index fc20132be0fd00abde1a8d2b602ee2f1df10a7df..8d490560577866e9884a1c9042bd5ecadfdd0236 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/DistilledPagePrefsView.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/DistilledPagePrefsView.java
@@ -4,6 +4,7 @@
 
 package org.chromium.chrome.browser.dom_distiller;
 
+import android.app.AlertDialog;
 import android.content.Context;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
@@ -52,6 +53,12 @@ public class DistilledPagePrefsView extends RadioGroup
                 .inflate(VIEW_LAYOUT, null);
     }
 
+    public static void showDialog(Context context) {
+        AlertDialog.Builder builder = new AlertDialog.Builder(context);
+        builder.setView(DistilledPagePrefsView.create(context));
+        builder.show();
+    }
+
     @Override
     public void onFinishInflate() {
         super.onFinishInflate();