Moving GraphicsContext and dependencies from core to platform.

Source/platform/graphics/filters/FilterOperations.h

Index: Source/platform/graphics/filters/FilterOperations.h
diff --git a/Source/core/platform/graphics/filters/FilterOperations.h b/Source/platform/graphics/filters/FilterOperations.h
similarity index 95%
rename from Source/core/platform/graphics/filters/FilterOperations.h
rename to Source/platform/graphics/filters/FilterOperations.h
index 44556d1528697c062eb7f44c4d88c9a9cc70da47..c220b828adbbe635aa1e0aae5011c17add569118 100644
--- a/Source/core/platform/graphics/filters/FilterOperations.h
+++ b/Source/platform/graphics/filters/FilterOperations.h
@@ -26,8 +26,9 @@
 #ifndef FilterOperations_h
 #define FilterOperations_h
 
-#include "core/platform/graphics/filters/FilterOperation.h"
+#include "platform/PlatformExport.h"
 #include "platform/geometry/IntRectExtent.h"
+#include "platform/graphics/filters/FilterOperation.h"
 #include "wtf/RefPtr.h"
 #include "wtf/Vector.h"
 
@@ -35,7 +36,7 @@ namespace WebCore {
 
 typedef IntRectExtent FilterOutsets;
 
-class FilterOperations {
+class PLATFORM_EXPORT FilterOperations {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     FilterOperations();