Hook up new distillability signal to DistillablePageUtils

components/dom_distiller/android/java/src/org/chromium/components/dom_distiller/content/DistillablePageUtils.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.components.dom_distiller.content;
 
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
 import org.chromium.content_public.browser.WebContents;
 
@@ skipping 15 matching lines @@
     }
 
     @CalledByNative
     private static void callOnIsPageDistillableResult(
             PageDistillableCallback callback, boolean isDistillable) {
         callback.onIsPageDistillableResult(isDistillable);
     }
 
     private static native void nativeIsPageDistillable(
             WebContents webContents, boolean isMobileOptimized, PageDistillableCallback callback);
+
+    /**
+     * Delegate to receive distillability updates.
+     */
+    public static interface PageDistillableDelegate {
+        public void onIsPageDistillableResult(boolean isDistillable, boolean isLast);

[mdjones, 2015/11/12 23:46:48]

Nit: javadoc for public interface.

[wychen, 2015/11/13 01:55:12]

Done.

+    }
+
+    public static void setDelegate(WebContents webContents,
+            PageDistillableDelegate delegate) {
+        nativeSetDelegate(webContents, delegate);
+    }
+
+    @CalledByNative
+    private static void callOnIsPageDistillableUpdate(
+            PageDistillableDelegate delegate, boolean isDistillable, boolean isLast) {
+        delegate.onIsPageDistillableResult(isDistillable, isLast);
+    }
+
+    private static native void nativeSetDelegate(
+            WebContents webContents, PageDistillableDelegate delegate);
 }
-