Add 'storage_only' template to make_computed_style_base.py.

third_party/WebKit/Source/core/style/ComputedStyle.h

Index: third_party/WebKit/Source/core/style/ComputedStyle.h
diff --git a/third_party/WebKit/Source/core/style/ComputedStyle.h b/third_party/WebKit/Source/core/style/ComputedStyle.h
index b8fcd80cd9aec15416b89efaf1db44e7e2a71665..614e3fd8aab6cd44e440ef7893ec84c5b833ab46 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyle.h
+++ b/third_party/WebKit/Source/core/style/ComputedStyle.h
@@ -2423,10 +2423,10 @@ class CORE_EXPORT ComputedStyle : public ComputedStyleBase,
   bool hasRemUnits() const { return m_nonInheritedData.m_hasRemUnits; }
   void setHasRemUnits() const { m_nonInheritedData.m_hasRemUnits = true; }
 
-  bool emptyState() const { return m_nonInheritedData.m_emptyState; }
+  bool emptyState() const { return m_emptyState; }
   void setEmptyState(bool b) {
     setUnique();
-    m_nonInheritedData.m_emptyState = b;
+    m_emptyState = b;
   }
 
   bool hasInlineTransform() const {