Show a replacement plug-in for loading errors.

webkit/tools/test_shell/test_webview_delegate.cc

Index: webkit/tools/test_shell/test_webview_delegate.cc
diff --git a/webkit/tools/test_shell/test_webview_delegate.cc b/webkit/tools/test_shell/test_webview_delegate.cc
index 9c5d4f92d5e12af686442f8955c7d85a221cf280..70fae8634e3d06244e918f4f9974e22870b67843 100644
--- a/webkit/tools/test_shell/test_webview_delegate.cc
+++ b/webkit/tools/test_shell/test_webview_delegate.cc
@@ -944,6 +944,11 @@ void TestWebViewDelegate::openFileSystem(
 
 // WebPluginPageDelegate -----------------------------------------------------
 
+WebKit::WebPlugin* TestWebViewDelegate::CreatePluginReplacement(
+    const FilePath& file_path) {
+  return NULL;
+}
+
 WebCookieJar* TestWebViewDelegate::GetCookieJar() {
   return WebKit::webKitPlatformSupport()->cookieJar();
 }