Revert of Remove javaEnabled setting.

LayoutTests/fast/plugins/plugin-placeholder-explicit-size.html

Index: LayoutTests/fast/plugins/plugin-placeholder-explicit-size.html
diff --git a/LayoutTests/fast/plugins/plugin-placeholder-explicit-size.html b/LayoutTests/fast/plugins/plugin-placeholder-explicit-size.html
index 6a2ff70c3ff3089f4540c838bc60b488f1bc5bbf..465ce24a1375dbe92cf48327974a8f12f365e728 100644
--- a/LayoutTests/fast/plugins/plugin-placeholder-explicit-size.html
+++ b/LayoutTests/fast/plugins/plugin-placeholder-explicit-size.html
@@ -18,6 +18,8 @@
 </template>
 
 <script>
+internals.settings.setJavaEnabled(true);
+
 var templateContent = document.getElementById('placeholder-template').content;
 Array.prototype.forEach.call(document.querySelectorAll("applet, embed, object"), function(plugin) {
     internals.forcePluginPlaceholder(plugin, templateContent);