Fix some warnings in Eclipse

javatests/org/chromium/distiller/webdocument/WebVideoTest.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.distiller.webdocument;
 
 import org.chromium.distiller.DomDistillerJsTestCase;
-import org.chromium.distiller.TestUtil;
 
 import com.google.gwt.dom.client.Document;
 import com.google.gwt.dom.client.Element;
-import com.google.gwt.dom.client.Node;
-
-import java.util.List;
 
 public class WebVideoTest extends DomDistillerJsTestCase {
     public void testGenerateOutput() {
         Element video = Document.get().createVideoElement();
         Element child = Document.get().createElement("source");
         child.setAttribute("src", "http://example.com/foo.ogg");
         video.appendChild(child);
 
         child = Document.get().createElement("track");
         child.setAttribute("src", "http://example.com/foo.vtt");
@@ skipping 37 matching lines @@
         // Output should ignore anything other than "track" and "source" tags.
         assertEquals(want, got);
     }
 
     public void testPosterEmpty() {
         Element video = Document.get().createVideoElement();
 
         String want = "<video></video>";
         WebVideo webVideo = new WebVideo(video, 400, 300);
 
-        
+
         String got = webVideo.generateOutput(false);
 
         assertEquals(want, got);
     }
 
 }