[Android WebView] Synthesize a fake page loading event on page source modification (Re-land)

content/public/android/java/src/org/chromium/content_public/browser/WebContents.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.content_public.browser;
 
 import org.chromium.base.VisibleForTesting;
 
 /**
  * The WebContents Java wrapper to allow communicating with the native WebContents object.
@@ skipping 121 matching lines @@
     public void selectWordAroundCaret();
 
     /**
      * Get the URL of the current page.
      *
      * @return The URL of the current page.
      */
     public String getUrl();
 
     /**
+     * Gets the last committed URL. It represents the current page that is
+     * displayed in this WebContents. It represents the current security context.
+     *
+     * @return The last committed URL.
+     */
+    public String getLastCommittedUrl();
+
+    /**
      * Get the InCognito state of WebContents.
      *
      * @return whether this WebContents is in InCognito mode or not
      */
     public boolean isIncognito();
 
     /**
      * Resumes the response which is deferred during start.
      */
     public void resumeResponseDeferredAtStart();
@@ skipping 54 matching lines @@
      *                 will be made on the main thread.
      *                 If no result is required, pass null.
      */
     public void evaluateJavaScript(String script, JavaScriptCallback callback);
 
     /**
      * Adds a log message to dev tools console. |level| must be a value of
      * org.chromium.content_public.common.ConsoleMessageLevel.
      */
     public void addMessageToDevToolsConsole(int level, String message);
+
+    /**
+     * Returns whether the initial empty page has been accessed by a script from another
+     * page. Always false after the first commit.
+     *
+     * @return Whether the initial empty page has been accessed by a script.
+     */
+    public boolean hasAccessedInitialDocument();
 }