Pass NavigationContext to WebStateImpl::OnNavigationStarted.

ios/web/webui/crw_web_ui_manager_unittest.mm

Index: ios/web/webui/crw_web_ui_manager_unittest.mm
diff --git a/ios/web/webui/crw_web_ui_manager_unittest.mm b/ios/web/webui/crw_web_ui_manager_unittest.mm
index 787559083f9fee841b7a114937b3454bca7ca0e4..1dc2fcfb547c466c2da11f484d9118e54460b763 100644
--- a/ios/web/webui/crw_web_ui_manager_unittest.mm
+++ b/ios/web/webui/crw_web_ui_manager_unittest.mm
@@ -21,6 +21,7 @@
 #import "ios/web/public/test/fakes/test_web_client.h"
 #include "ios/web/public/test/scoped_testing_web_client.h"
 #include "ios/web/public/test/web_test.h"
+#include "ios/web/web_state/navigation_context_impl.h"
 #import "ios/web/web_state/web_state_impl.h"
 #import "ios/web/webui/crw_web_ui_page_builder.h"
 #import "ios/web/webui/url_fetcher_block_adapter.h"
@@ -146,7 +147,10 @@ TEST_F(CRWWebUIManagerTest, LoadWebUI) {
   base::string16 html(base::SysNSStringToUTF16(kHtml));
   GURL url(kTestWebUIUrl);
   EXPECT_CALL(*web_state_impl_, LoadWebUIHtml(html, url));
-  web_state_impl_->OnProvisionalNavigationStarted(url);
+  std::unique_ptr<web::NavigationContext> context =
+      NavigationContextImpl::CreateNavigationContext(web_state_impl_.get(),
+                                                     url);
+  web_state_impl_->OnNavigationStarted(context.get());
 }
 
 // Tests that CRWWebUIManager responds to OnScriptCommandReceieved call and runs