Implemented WebStateObserver::DidFinishNavigation(NavigationHandle*).

ios/web/web_state/web_state_impl.mm

Index: ios/web/web_state/web_state_impl.mm
diff --git a/ios/web/web_state/web_state_impl.mm b/ios/web/web_state/web_state_impl.mm
index c30fd510d0d55ef24b2c7bb100f33af4dd9ff8ae..8c8d116bf781dfee022c433c76c15ba6abac4e79 100644
--- a/ios/web/web_state/web_state_impl.mm
+++ b/ios/web/web_state/web_state_impl.mm
@@ -31,6 +31,7 @@
 #include "ios/web/public/web_thread.h"
 #include "ios/web/public/webui/web_ui_ios_controller.h"
 #include "ios/web/web_state/global_web_state_event_tracker.h"
+#include "ios/web/web_state/navigation_handle_impl.h"
 #import "ios/web/web_state/ui/crw_web_controller.h"
 #import "ios/web/web_state/ui/crw_web_controller_container_view.h"
 #include "ios/web/web_state/web_state_facade_delegate.h"
@@ -186,6 +187,10 @@ void WebStateImpl::SetFacadeDelegate(WebStateFacadeDelegate* facade_delegate) {
 
 void WebStateImpl::OnNavigationCommitted(const GURL& url) {
   UpdateHttpResponseHeaders(url);
+  std::unique_ptr<NavigationHandle> handle =
+      NavigationHandleImpl::CreateNavigationHandle(this, url);
+  for (auto& observer : observers_)
+    observer.DidFinishNavigation(handle.get());
 }
 
 void WebStateImpl::OnUrlHashChanged() {
@@ -198,6 +203,20 @@ void WebStateImpl::OnHistoryStateChanged() {
     observer.HistoryStateChanged();
 }
 
+void WebStateImpl::OnSamePageNavigation(const GURL& url) {
+  std::unique_ptr<NavigationHandle> handle =
+      NavigationHandleImpl::CreateSamePageNavigationHandle(this, url);
+  for (auto& observer : observers_)
+    observer.DidFinishNavigation(handle.get());
+}
+
+void WebStateImpl::OnErrorPageNavigation(const GURL& url) {
+  std::unique_ptr<NavigationHandle> handle =
+      NavigationHandleImpl::CreateErrorPageNavigationHandle(this, url);
+  for (auto& observer : observers_)
+    observer.DidFinishNavigation(handle.get());
+}
+
 void WebStateImpl::OnRenderProcessGone() {
   for (auto& observer : observers_)
     observer.RenderProcessGone();