Use jinja2 templating engine for Python code generators

Source/core/page/RuntimeEnabledFeatures.cpp.tmpl

Index: Source/core/page/RuntimeEnabledFeatures.cpp.tmpl
diff --git a/Source/core/page/RuntimeEnabledFeatures.cpp.tmpl b/Source/core/page/RuntimeEnabledFeatures.cpp.tmpl
new file mode 100644
index 0000000000000000000000000000000000000000..4f04dbef548e934c85b34a50606d65b0e500f3be
--- /dev/null
+++ b/Source/core/page/RuntimeEnabledFeatures.cpp.tmpl
@@ -0,0 +1,16 @@
+{% from "macros.tmpl" import wrap_with_condition -%}
+
+{{ license }}
+#include "config.h"
+#include "RuntimeEnabledFeatures.h"
+
+namespace WebCore {
+
+{%- for feature in features if not feature.custom %}
+{%- call wrap_with_condition(feature.condition) %}
+bool RuntimeEnabledFeatures::is{{feature.name}}Enabled = {{feature.default}};
+{%- endcall %}
+{%- endfor %}
+
+} // namespace WebCore
+