Reland HTMLPlugInElement: Use custom focus logic only when there is a plugin.

Source/core/html/HTMLObjectElement.cpp

Index: Source/core/html/HTMLObjectElement.cpp
diff --git a/Source/core/html/HTMLObjectElement.cpp b/Source/core/html/HTMLObjectElement.cpp
index 2bb33528650898666d1c8fbb294e371377b8e694..b47e37060de6a71159ea63af866e71f892565db1 100644
--- a/Source/core/html/HTMLObjectElement.cpp
+++ b/Source/core/html/HTMLObjectElement.cpp
@@ -437,7 +437,9 @@ bool HTMLObjectElement::appendFormData(FormDataList& encoding, bool)
     if (name().isEmpty())
         return false;
 
-    Widget* widget = pluginWidget();
+    // Widget is needed immediately to satisfy cases like
+    // LayoutTests/plugins/form-value.html.
+    Widget* widget = pluginWidgetForJSBindings();
     if (!widget || !widget->isPluginView())
         return false;
     String value;