Photo Picker Dialog: Recursively traverse the photo directories.

chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PhotoPickerDialog.java

 // Copyright 2017 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.chrome.browser.photo_picker;
 
 import android.content.Context;
 import android.os.Bundle;
 import android.support.v7.app.AlertDialog;
 import android.view.ViewGroup.LayoutParams;
@@ skipping 28 matching lines @@
     }
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
         getWindow().setLayout(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
         getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                 WindowManager.LayoutParams.FLAG_FULLSCREEN);
     }
+
+    @Override
+    public void dismiss() {
+        super.dismiss();
+        mCategoryView.onDialogDismissed();
+    }
 }