Issue 6418 - Override `onShowFileChooser` method

libadblockplus-android-webview/src/org/adblockplus/libadblockplus/android/webview/AdblockWebView.java

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 package org.adblockplus.libadblockplus.android.webview;
 
 import android.annotation.TargetApi;
 import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
 import android.graphics.Color;
+import android.net.Uri;
 import android.net.http.SslError;
 import android.os.Build;
 import android.os.Handler;
 import android.os.Message;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.KeyEvent;
 import android.view.View;
 import android.webkit.ConsoleMessage;
 import android.webkit.GeolocationPermissions;
@@ skipping 533 matching lines @@
       {
         w("Workaround for the issue #5303");
         stopPreventDrawing();
       }
 
       if (extWebChromeClient != null)
       {
         extWebChromeClient.onProgressChanged(view, newProgress);
       }
     }
+
+    @Override
+    public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback,
+                                     FileChooserParams fileChooserParams)
+    {
+      if (extWebChromeClient != null)
+      {
+        return extWebChromeClient.onShowFileChooser(webView, filePathCallback, fileChooserParams);
+      }
+      else
+      {
+        return super.onShowFileChooser(webView, filePathCallback, fileChooserParams);
+      }
+    }
   };
 
   public int getAllowDrawDelay()
   {
     return allowDrawDelay;
   }
 
   /**
    * Set start redraw delay after DOM modified with injected JS
    * (used to prevent flickering after 'DOM ready')
@@ skipping 850 matching lines @@
         w("Busy with elemhide selectors, delayed disposing scheduled");
         elemHideThread.setFinishedRunnable(disposeRunnable);
       }
       else
       {
         disposeRunnable.run();
       }
     }
   }
 }