[android_webview] Call onPageFinished for anchor navigations.

content/browser/android/web_contents_observer_android.cc

Index: content/browser/android/web_contents_observer_android.cc
diff --git a/content/browser/android/web_contents_observer_android.cc b/content/browser/android/web_contents_observer_android.cc
index 235041be67422e2924b9bf106d613693048a5df0..797ea3b1af92afc3ea23ab2b2b75ab31bc6e2ae9 100644
--- a/content/browser/android/web_contents_observer_android.cc
+++ b/content/browser/android/web_contents_observer_android.cc
@@ -130,9 +130,16 @@ void WebContentsObserverAndroid::DidNavigateMainFrame(
       ConvertUTF8ToJavaString(env, params.url.spec()));
   ScopedJavaLocalRef<jstring> jstring_base_url(
       ConvertUTF8ToJavaString(env, params.base_url.spec()));
-  Java_WebContentsObserverAndroid_didNavigateMainFrame(
+  // See http://crbug.com/251330 for why it's determined this way.
+  bool in_page_navigation =
+      details.type == NAVIGATION_TYPE_IN_PAGE || details.is_in_page;
+  // TODO(mkosiba): delete once downstream rolls.
+  Java_WebContentsObserverAndroid_didNavigateMainFrameV_JLS_JLS_Z(
       env, obj.obj(), jstring_url.obj(), jstring_base_url.obj(),
       details.is_navigation_to_different_page());
+  Java_WebContentsObserverAndroid_didNavigateMainFrameV_JLS_JLS_Z_Z(
+      env, obj.obj(), jstring_url.obj(), jstring_base_url.obj(),
+      details.is_navigation_to_different_page(), in_page_navigation);
 }
 
 void WebContentsObserverAndroid::DidNavigateAnyFrame(