Componentization: make core/animation,clipboard,css,dom,editing,frame,html visible for blink_web.

Source/core/html/HTMLContentElement.h

Index: Source/core/html/HTMLContentElement.h
diff --git a/Source/core/html/HTMLContentElement.h b/Source/core/html/HTMLContentElement.h
index 6133df7d44ec9d903728e9c5e2ccb15bc2efd742..9fd6652a62aae8eb3af654835d4d98a3ef1f5ac0 100644
--- a/Source/core/html/HTMLContentElement.h
+++ b/Source/core/html/HTMLContentElement.h
@@ -31,12 +31,13 @@
 #ifndef HTMLContentElement_h
 #define HTMLContentElement_h
 
+#include "core/CoreExport.h"
 #include "core/css/CSSSelectorList.h"
 #include "core/dom/shadow/InsertionPoint.h"
 
 namespace blink {
 
-class HTMLContentElement final : public InsertionPoint {
+class CORE_EXPORT HTMLContentElement final : public InsertionPoint {
     DEFINE_WRAPPERTYPEINFO();
 public:
     DECLARE_NODE_FACTORY(HTMLContentElement);