Moving GraphicsContext and dependencies from core to platform.

Source/platform/scroll/ScrollAnimator.h

Index: Source/platform/scroll/ScrollAnimator.h
diff --git a/Source/core/platform/ScrollAnimator.h b/Source/platform/scroll/ScrollAnimator.h
similarity index 96%
rename from Source/core/platform/ScrollAnimator.h
rename to Source/platform/scroll/ScrollAnimator.h
index 0eab2f037a0ed9e966292a1fdeb22c439f7ce0d8..9f2e2dc25827e3425d4af44e47a4950d44e2148f 100644
--- a/Source/core/platform/ScrollAnimator.h
+++ b/Source/platform/scroll/ScrollAnimator.h
@@ -31,11 +31,13 @@
 #ifndef ScrollAnimator_h
 #define ScrollAnimator_h
 
+#include "platform/PlatformExport.h"
 #include "platform/PlatformWheelEvent.h"
 #include "platform/geometry/FloatSize.h"
 #include "platform/scroll/ScrollTypes.h"
 #include "wtf/FastAllocBase.h"
 #include "wtf/Forward.h"
+#include "wtf/Noncopyable.h"
 #include "wtf/UnusedParam.h"
 
 namespace WebCore {
@@ -44,8 +46,8 @@ class FloatPoint;
 class ScrollableArea;
 class Scrollbar;
 
-class ScrollAnimator {
-    WTF_MAKE_FAST_ALLOCATED;
+class PLATFORM_EXPORT ScrollAnimator {
+    WTF_MAKE_FAST_ALLOCATED; WTF_MAKE_NONCOPYABLE(ScrollAnimator);
 public:
     static PassOwnPtr<ScrollAnimator> create(ScrollableArea*);