Use jinja2 templating engine for Python code generators

Source/core/dom/EventFactory.cpp.tmpl

Index: Source/core/dom/EventFactory.cpp.tmpl
diff --git a/Source/core/dom/EventFactory.cpp.tmpl b/Source/core/dom/EventFactory.cpp.tmpl
new file mode 100644
index 0000000000000000000000000000000000000000..dfbe9e4cab684c08191b5b944aaa3a9c6f1da731
--- /dev/null
+++ b/Source/core/dom/EventFactory.cpp.tmpl
@@ -0,0 +1,26 @@
+{% from "macros.tmpl" import wrap_with_condition -%}
+
+{{ license }}
+#include "config.h"
+#include "EventFactory.h"
+
+#include "EventHeaders.h"
+#include "RuntimeEnabledFeatures.h"
+
+namespace WebCore {
+
+PassRefPtr<{{namespace}}> {{namespace}}Factory::create(const String& type)
+{
+{%- for event in events %}
+{%- call wrap_with_condition(event.conditional) %}
+    if (type == "{{event.name}}"
+        {{- " && RuntimeEnabledFeatures::" + event.runtimeConditional + "()" if event.runtimeConditional else "" -}}
+    )
+        return {{event.interfaceName}}::create();
+{%- endcall %}
+{%- endfor %}
+    return 0;
+}
+
+} // namespace WebCore
+