[android_webview] Call onPageFinished for anchor navigations.

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 9578611b0c3bad9593b557f0cd93bff1fda3e41c..09a20aedc8600309e2413c9c02988d4f9d0d3bec 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
@@ -50,15 +50,24 @@ public abstract class WebContentsObserverAndroid {
             boolean isMainFrame, int errorCode, String description, String failingUrl) {
     }
 
+    // TODO(mkosiba): delete once downstream rolls.
+    @Deprecated
+    @CalledByNative
+    public void didNavigateMainFrame(String url, String baseUrl,
+            boolean isNavigationToDifferentPage) {
+    }
+
     /**
      * Called when the main frame of the page has committed.
      * @param url The validated url for the page.
      * @param baseUrl The validated base url for the page.
      * @param isNavigationToDifferentPage Whether the main frame navigated to a different page.
+     * @param isNavigationInPage Whether the main frame navigation did not cause changes to the
+     *                           document (for example scrolling to a named anchor or PopState).
      */
     @CalledByNative
     public void didNavigateMainFrame(String url, String baseUrl,
-            boolean isNavigationToDifferentPage) {
+            boolean isNavigationToDifferentPage, boolean isNavigationInPage) {
     }
 
     /**