Componentization: make core classes visible for blink_tests and blink_web.

Source/core/frame/OriginsUsingFeatures.h

Index: Source/core/frame/OriginsUsingFeatures.h
diff --git a/Source/core/frame/OriginsUsingFeatures.h b/Source/core/frame/OriginsUsingFeatures.h
index 72ba1b1da6002ad3abe3e4cf19d3cfee6d7a5fd5..a9f448937c00e6e391c2257659dd19c0a286f494 100644
--- a/Source/core/frame/OriginsUsingFeatures.h
+++ b/Source/core/frame/OriginsUsingFeatures.h
@@ -5,6 +5,7 @@
 #ifndef OriginsUsingFeatures_h
 #define OriginsUsingFeatures_h
 
+#include "core/CoreExport.h"
 #include "platform/heap/Handle.h"
 #include "wtf/HashMap.h"
 #include "wtf/Vector.h"
@@ -17,7 +18,7 @@ class Document;
 class EventTarget;
 class ScriptState;
 
-class OriginsUsingFeatures {
+class CORE_EXPORT OriginsUsingFeatures {
     DISALLOW_ALLOCATION();
 public:
     ~OriginsUsingFeatures();