Add support for generating external types in ComputedStyleBase.

third_party/WebKit/Source/build/scripts/templates/ComputedStyleBase.h.tmpl

Index: third_party/WebKit/Source/build/scripts/templates/ComputedStyleBase.h.tmpl
diff --git a/third_party/WebKit/Source/build/scripts/templates/ComputedStyleBase.h.tmpl b/third_party/WebKit/Source/build/scripts/templates/ComputedStyleBase.h.tmpl
index b40d4dfc6e5202e91f8dd6642a3ef1a7c1256402..047caddc55a9a694c5e2feafdb3de62dcd5eebc2 100644
--- a/third_party/WebKit/Source/build/scripts/templates/ComputedStyleBase.h.tmpl
+++ b/third_party/WebKit/Source/build/scripts/templates/ComputedStyleBase.h.tmpl
@@ -16,7 +16,13 @@
 {% import 'fields/keyword.tmpl' as keyword %}
 {% import 'fields/flag.tmpl' as flag %}
 {% import 'fields/monotonic_flag.tmpl' as monotonic_flag %}
-{% set field_templates = { 'keyword': keyword, 'flag': flag, 'monotonic_flag': monotonic_flag } %}
+{% import 'fields/external.tmpl' as external %}
+{% set field_templates = {
+     'keyword': keyword,
+     'flag': flag,
+     'monotonic_flag': monotonic_flag,
+     'external': external
+   } %}
 
 namespace blink {
 
@@ -26,7 +32,11 @@ class CORE_EXPORT ComputedStyleBase {
  public:
   ALWAYS_INLINE ComputedStyleBase() :
   {% for field in fields %}
+      {% if field.is_packed %}
       {{field.name}}(static_cast<unsigned>({{field.default_value}})){{print_if(not loop.last, ',')}}
+      {% else %}
+      {{field.name}}({{field.default_value}}){{print_if(not loop.last, ',')}}
+      {% endif %}
   {% endfor %}
   {}
   ~ComputedStyleBase() {}
@@ -105,7 +115,11 @@ class CORE_EXPORT ComputedStyleBase {
  protected:
   // Storage.
   {% for field in fields %}
+  {% if field.is_packed %}
   unsigned {{field.name}} : {{field.size}}; // {{field.type_name}}
+  {% else %}
+  {{field.type_name}} {{field.name}};
+  {% endif %}
   {% endfor %}
 };