Add content browser test for <optgroup> with 'display: none'

content/public/test/render_view_test.cc

Index: content/public/test/render_view_test.cc
diff --git a/content/public/test/render_view_test.cc b/content/public/test/render_view_test.cc
index f4e44ca6d064f6bf390dd3281731a373ab83c4ba..3a8a9cb613b586290e9ac895434bdb2e0f786982 100644
--- a/content/public/test/render_view_test.cc
+++ b/content/public/test/render_view_test.cc
@@ -114,6 +114,21 @@ bool RenderViewTest::ExecuteJavaScriptAndReturnIntValue(
   return true;
 }
 
+bool RenderViewTest::ExecuteJavaScriptAndReturnStringValue(
+    const base::string16& script,
+    std::string& value)
+{
+  v8::HandleScope handle_scope(v8::Isolate::GetCurrent());
+  v8::Handle<v8::Value> result =
+      GetMainFrame()->executeScriptAndReturnValue(WebScriptSource(script));
+  if (result.IsEmpty() || !result->IsString())
+    return false;
+
+  std::string resultStr(*v8::String::Utf8Value(result));
+  value.swap(resultStr);
+  return true;
+}
+
 void RenderViewTest::LoadHTML(const char* html) {
   std::string url_str = "data:text/html;charset=utf-8,";
   url_str.append(html);