WebView: prefer ContentUrlConstants over literals

android_webview/javatests/src/org/chromium/android_webview/test/AwSettingsTest.java

 // Copyright 2012 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.android_webview.test;
 
 import static org.chromium.base.test.util.ScalableTimeout.scaleTimeout;
 
 import android.content.Context;
 import android.graphics.Point;
@@ skipping 20 matching lines @@
 import org.chromium.android_webview.test.util.VideoTestWebServer;
 import org.chromium.base.test.util.CallbackHelper;
 import org.chromium.base.test.util.DisabledTest;
 import org.chromium.base.test.util.Feature;
 import org.chromium.base.test.util.RetryOnFailure;
 import org.chromium.base.test.util.TestFileUtil;
 import org.chromium.base.test.util.UrlUtils;
 import org.chromium.content.browser.test.util.DOMUtils;
 import org.chromium.content.browser.test.util.HistoryUtils;
 import org.chromium.content_public.browser.WebContents;
+import org.chromium.content_public.common.ContentUrlConstants;
 import org.chromium.net.test.EmbeddedTestServer;
 import org.chromium.net.test.util.TestWebServer;
 import org.chromium.ui.display.DisplayAndroid;
 
 import java.io.File;
 import java.util.concurrent.Callable;
 import java.util.concurrent.TimeUnit;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ skipping 2877 matching lines @@
     private void doAllowEmptyDocumentPersistenceTest(boolean allow) throws Throwable {
         mOverridenFactory = new EmptyDocumentPeristenceTestDependencyFactory(allow);
 
         final TestAwContentsClient client = new TestAwContentsClient();
         final AwTestContainerView mContainerView = createAwTestContainerViewOnMainSync(client);
         final AwContents awContents = mContainerView.getAwContents();
         enableJavaScriptOnUiThread(awContents);
         JSUtils.executeJavaScriptAndWaitForResult(this, awContents,
                 client.getOnEvaluateJavaScriptResultHelper(),
                 "window.emptyDocumentPersistenceTest = true;");
-        loadUrlSync(awContents, client.getOnPageFinishedHelper(), "about:blank");
+        loadUrlSync(awContents, client.getOnPageFinishedHelper(),
+                ContentUrlConstants.ABOUT_BLANK_DISPLAY_URL);
         String result = JSUtils.executeJavaScriptAndWaitForResult(this, awContents,
                 client.getOnEvaluateJavaScriptResultHelper(),
                 "window.emptyDocumentPersistenceTest ? 'set' : 'not set';");
         assertEquals(allow ? "\"set\"" : "\"not set\"", result);
     }
 
     @SmallTest
     @Feature({"AndroidWebView", "Preferences"})
     public void testAllowEmptyDocumentPersistence() throws Throwable {
         doAllowEmptyDocumentPersistenceTest(true);
@@ skipping 243 matching lines @@
         final AwContents awContents = webView.getAwContents();
         runTestOnUiThread(new Runnable() {
             @Override
             public void run() {
                 awContents.getContentViewCore().sendDoubleTapForTest(
                         SystemClock.uptimeMillis(), x, y);
             }
         });
     }
 }