[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

Index: content/public/android/java/src/org/chromium/content_public/browser/WebContents.java
diff --git a/content/public/android/java/src/org/chromium/content_public/browser/WebContents.java b/content/public/android/java/src/org/chromium/content_public/browser/WebContents.java
index 19021612cb0aeff4784ffe89ce49caa610f0d831..19b00b220e8104733889ba9e9a0ace3bf98a2bce 100644
--- a/content/public/android/java/src/org/chromium/content_public/browser/WebContents.java
+++ b/content/public/android/java/src/org/chromium/content_public/browser/WebContents.java
@@ -139,6 +139,14 @@ public interface WebContents {
     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
@@ -213,4 +221,12 @@ public interface WebContents {
      * 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();
 }