[Android WebView] Filter out error page URL from onPageFinished to un-flake tests

content/public/android/java/src/org/chromium/content/browser/WebContentsObserverAndroid.java

Index: content/public/android/java/src/org/chromium/content/browser/WebContentsObserverAndroid.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/WebContentsObserverAndroid.java b/content/public/android/java/src/org/chromium/content/browser/WebContentsObserverAndroid.java
index b497d90d08f867109cadf3d77df0dbdf4ad25d76..4b3859e0db52ef0b8a75fa4f1368ca8ca91be501 100644
--- a/content/public/android/java/src/org/chromium/content/browser/WebContentsObserverAndroid.java
+++ b/content/public/android/java/src/org/chromium/content/browser/WebContentsObserverAndroid.java
@@ -120,9 +120,11 @@ public abstract class WebContentsObserverAndroid {
      * @param frameId A positive, non-zero integer identifying the navigating frame.
      * @param validatedUrl The validated URL that is being navigated to.
      * @param isMainFrame Whether the load is happening for the main frame.
+     * @param isErrorPage Whether the url is the URL of the error page
      */
     @CalledByNative
-    public void didFinishLoad(long frameId, String validatedUrl, boolean isMainFrame) {
+    public void didFinishLoad(long frameId, String validatedUrl, boolean isMainFrame,
+                              boolean isErrorPage) {
     }
 
     /**