Move ScrollElasticityController to platform/mac/

Source/platform/mac/ScrollElasticityController.h

Index: Source/platform/mac/ScrollElasticityController.h
diff --git a/Source/core/platform/mac/ScrollElasticityController.h b/Source/platform/mac/ScrollElasticityController.h
similarity index 96%
rename from Source/core/platform/mac/ScrollElasticityController.h
rename to Source/platform/mac/ScrollElasticityController.h
index 180e79c9335c9e0cd8c93f143b85de2e5f774eb4..d1caab9621b790223e1b087b0f3a3fcf01f99fd2 100644
--- a/Source/core/platform/mac/ScrollElasticityController.h
+++ b/Source/platform/mac/ScrollElasticityController.h
@@ -28,6 +28,9 @@
 
 #if USE(RUBBER_BANDING)
 
+#import <CoreFoundation/CoreFoundation.h>
+
+#include "platform/PlatformExport.h"
 #include "platform/geometry/FloatPoint.h"
 #include "platform/geometry/FloatSize.h"
 #include "platform/scroll/ScrollTypes.h"
@@ -37,7 +40,7 @@ namespace WebCore {
 
 class PlatformWheelEvent;
 
-class ScrollElasticityControllerClient {
+class PLATFORM_EXPORT ScrollElasticityControllerClient {
 protected:
     virtual ~ScrollElasticityControllerClient() { }