Make isVisible() faster and more accurate

javatests/org/chromium/distiller/webdocument/DomConverterTest.java

Index: javatests/org/chromium/distiller/webdocument/DomConverterTest.java
diff --git a/javatests/org/chromium/distiller/webdocument/DomConverterTest.java b/javatests/org/chromium/distiller/webdocument/DomConverterTest.java
index 6d813cc87734f5d0e3b622a711a2c9fb72869e42..315a4de98a76631309322fd7b33df6723c37cb2f 100644
--- a/javatests/org/chromium/distiller/webdocument/DomConverterTest.java
+++ b/javatests/org/chromium/distiller/webdocument/DomConverterTest.java
@@ -38,10 +38,6 @@ public class DomConverterTest extends DomDistillerJsTestCase {
         runTest("<div style=\"display:none\">diplay none</div>", "");
     }
 
-    public void testVisibilityHidden() throws Throwable {
-        runTest("<div style=\"visibility:hidden\">visibility hidden</div>", "");
-    }
-
     public void testInvisibleInVisible() throws Throwable {
         String html = "<div>visible parent" +
                           "<div style=\"display:none\">invisible child</div>" +
@@ -50,7 +46,7 @@ public class DomConverterTest extends DomDistillerJsTestCase {
     }
 
     public void testVisibleInInvisible() throws Throwable {
-        String html = "<div style=\"visibility:hidden\">invisible parent" +
+        String html = "<div style=\"display:none\">invisible parent" +
                           "<div>visible child</div>" +
                       "</div>";
         runTest(html, "");
@@ -64,7 +60,7 @@ public class DomConverterTest extends DomDistillerJsTestCase {
     }
 
     public void testInvisibleInInvisible() throws Throwable {
-        String html = "<div style=\"visibility:hidden\">invisible parent" +
+        String html = "<div style=\"display:none\">invisible parent" +
                           "<div style=\"display:none\">invisible child</div>" +
                       "</div>";
         runTest(html, "");
@@ -74,20 +70,20 @@ public class DomConverterTest extends DomDistillerJsTestCase {
         String html = "<div>visible parent" +
                           "<div style=\"display:none\">invisible child0</div>" +
                           "<div>visible child1" +
-                              "<div style=\"visibility:hidden\">invisible grandchild</div>" +
+                              "<div style=\"display:none\">invisible grandchild</div>" +
                           "</div>" +
-                          "<div style=\"visibility:hidden\">invisible child2</div>" +
+                          "<div style=\"display:none\">invisible child2</div>" +
                       "</div>";
         runTest(html, "<div>visible parent<div>visible child1</div></div>");
     }
 
     public void testDifferentChildrenInInvisible() throws Throwable {
-        String html = "<div style=\"visibility:hidden\">invisible parent" +
+        String html = "<div style=\"display:none\">invisible parent" +
                           "<div style=\"display:none\">invisible child0</div>" +
                           "<div>visible child1" +
                               "<div style=\"display:none\">invisible grandchild</div>" +
                           "</div>" +
-                          "<div style=\"visibility:hidden\">invisible child2</div>" +
+                          "<div style=\"display:none\">invisible child2</div>" +
                       "</div>";
         runTest(html, "");
     }
@@ -134,6 +130,7 @@ public class DomConverterTest extends DomDistillerJsTestCase {
     public void testElementOrder() {
         Element container = Document.get().createDivElement();
         container.setInnerHTML("Text content <img src=\"http://example.com/1.jpg\"> more content");
+        mBody.appendChild(container);
 
         WebDocumentBuilder builder = new WebDocumentBuilder();
         DomConverter converter = new DomConverter(builder);
@@ -156,6 +153,7 @@ public class DomConverterTest extends DomDistillerJsTestCase {
     public void testList() throws Throwable {
         Element container = Document.get().createDivElement();
         container.setInnerHTML("<ol><li>some text1</li><li>some text2</li></ol>");
+        mBody.appendChild(container);
 
         WebDocumentBuilder builder = new WebDocumentBuilder();
         DomConverter converter = new DomConverter(builder);