Fix some warnings in Eclipse

javatests/org/chromium/distiller/EmbedExtractorTest.java

 // Copyright 2014 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;
 
 import org.chromium.distiller.webdocument.WebEmbed;
 import org.chromium.distiller.extractors.embeds.EmbedExtractor;
 import org.chromium.distiller.extractors.embeds.TwitterExtractor;
 import org.chromium.distiller.extractors.embeds.VimeoExtractor;
 import org.chromium.distiller.extractors.embeds.YouTubeExtractor;
 
 import com.google.gwt.dom.client.Document;
 import com.google.gwt.dom.client.Element;
 import com.google.gwt.dom.client.IFrameElement;
 
-import java.util.List;
-
 public class EmbedExtractorTest extends DomDistillerJsTestCase {
 
     public void testYouTubeExtractor() {
         Element youtube = TestUtil.createIframe();
         youtube.setAttribute("src", "http://www.youtube.com/embed/M7lc1UVf-VE?autoplay=1");
 
         EmbedExtractor extractor = new YouTubeExtractor();
         WebEmbed result = (WebEmbed) extractor.extract(youtube);
 
         // Check YouTube specific attributes
@@ skipping 165 matching lines @@
         // Test no important twitter content.
         notTwitter = TestUtil.createIframe();
         mBody.appendChild(notTwitter);
         notTwitter.getContentDocument().getBody().setInnerHTML(
                 iframeStructure.replaceAll("data-tweet-id", "data-bad-id"));
 
         result = (WebEmbed) extractor.extract(notTwitter);
         assertNull(result);
     }
 }