Componentization: make symbols visible.

Source/core/style/NinePieceImage.h

Index: Source/core/style/NinePieceImage.h
diff --git a/Source/core/style/NinePieceImage.h b/Source/core/style/NinePieceImage.h
index 37068587ece0b8e4a954a3a81b86352acfd32848..b5cbcb9cc4d005acbebed422f8903494d93b3c3b 100644
--- a/Source/core/style/NinePieceImage.h
+++ b/Source/core/style/NinePieceImage.h
@@ -24,6 +24,7 @@
 #ifndef NinePieceImage_h
 #define NinePieceImage_h
 
+#include "core/CoreExport.h"
 #include "core/style/BorderImageLengthBox.h"
 #include "core/style/DataRef.h"
 #include "core/style/StyleImage.h"
@@ -36,7 +37,7 @@ enum ENinePieceImageRule {
     StretchImageRule, RoundImageRule, SpaceImageRule, RepeatImageRule
 };
 
-class NinePieceImageData : public RefCounted<NinePieceImageData> {
+class CORE_EXPORT NinePieceImageData : public RefCounted<NinePieceImageData> {
 public:
     static PassRefPtr<NinePieceImageData> create() { return adoptRef(new NinePieceImageData); }
     PassRefPtr<NinePieceImageData> copy() const { return adoptRef(new NinePieceImageData(*this)); }
@@ -57,7 +58,7 @@ private:
     NinePieceImageData(const NinePieceImageData&);
 };
 
-class NinePieceImage {
+class CORE_EXPORT NinePieceImage {
 public:
     NinePieceImage();
     NinePieceImage(PassRefPtr<StyleImage>, LengthBox imageSlices, bool fill, const BorderImageLengthBox& borderSlices,