Move field-dependent code in ComputedStyleBase to Jinja macros.

third_party/WebKit/Source/build/scripts/templates/fields/base.tmpl

Index: third_party/WebKit/Source/build/scripts/templates/fields/base.tmpl
diff --git a/third_party/WebKit/Source/build/scripts/templates/fields/base.tmpl b/third_party/WebKit/Source/build/scripts/templates/fields/base.tmpl
new file mode 100644
index 0000000000000000000000000000000000000000..0685305032939dbdb5da46800e81f9690f020792
--- /dev/null
+++ b/third_party/WebKit/Source/build/scripts/templates/fields/base.tmpl
@@ -0,0 +1,15 @@
+{% macro decl_methods(field) -%}
+inline static {{field.type_name}} {{field.initial_method_name}}() {
+  return {{field.default_value}};
+}
+{{field.type_name}} {{field.getter_method_name}}() const {
+  return static_cast<{{field.type_name}}>({{field.name}});
+}
+void {{field.setter_method_name}}({{field.type_name}} v) {
+  {{field.name}} = static_cast<unsigned>(v);
+}
+inline void {{field.resetter_method_name}}() {
+  {{field.name}} = static_cast<unsigned>({{field.default_value}});
+}
+{%- endmacro %}
+