Moving GraphicsContext and dependencies from core to platform.

Source/platform/scroll/ScrollbarThemeWin.h

Index: Source/platform/scroll/ScrollbarThemeWin.h
diff --git a/Source/core/platform/ScrollbarThemeWin.h b/Source/platform/scroll/ScrollbarThemeWin.h
similarity index 95%
rename from Source/core/platform/ScrollbarThemeWin.h
rename to Source/platform/scroll/ScrollbarThemeWin.h
index 5b5ee6e444a5d434e603aa63f7e2da86bcd7bb9e..9c6911ed402b1c0eaebd07ebbbaecb0e7d0adbb7 100644
--- a/Source/core/platform/ScrollbarThemeWin.h
+++ b/Source/platform/scroll/ScrollbarThemeWin.h
@@ -31,11 +31,11 @@
 #ifndef ScrollbarThemeWin_h
 #define ScrollbarThemeWin_h
 
-#include "core/platform/ScrollbarThemeNonMacCommon.h"
+#include "platform/scroll/ScrollbarThemeNonMacCommon.h"
 
 namespace WebCore {
 
-class ScrollbarThemeWin : public ScrollbarThemeNonMacCommon {
+class PLATFORM_EXPORT ScrollbarThemeWin : public ScrollbarThemeNonMacCommon {
 public:
     virtual int scrollbarThickness(ScrollbarControlSize) OVERRIDE;
     virtual bool invalidateOnMouseEnterExit() OVERRIDE;