Moving GraphicsContext and dependencies from core to platform.

Source/platform/graphics/StrokeData.h

Index: Source/platform/graphics/StrokeData.h
diff --git a/Source/core/platform/graphics/StrokeData.h b/Source/platform/graphics/StrokeData.h
similarity index 96%
rename from Source/core/platform/graphics/StrokeData.h
rename to Source/platform/graphics/StrokeData.h
index 754c1c31ac00a2a32a976b6d38a7c09927cf4ad2..177012d599924bc7b96526f723afb80fa49ec984 100644
--- a/Source/core/platform/graphics/StrokeData.h
+++ b/Source/platform/graphics/StrokeData.h
@@ -29,10 +29,11 @@
 #ifndef StrokeData_h
 #define StrokeData_h
 
-#include "core/platform/graphics/Gradient.h"
-#include "core/platform/graphics/Pattern.h"
+#include "platform/PlatformExport.h"
 #include "platform/graphics/DashArray.h"
+#include "platform/graphics/Gradient.h"
 #include "platform/graphics/GraphicsTypes.h"
+#include "platform/graphics/Pattern.h"
 #include "third_party/skia/include/core/SkColorPriv.h"
 #include "third_party/skia/include/effects/SkDashPathEffect.h"
 #include "wtf/PassRefPtr.h"
@@ -42,7 +43,7 @@ namespace WebCore {
 
 // Encapsulates stroke painting information.
 // It is pulled out of GraphicsContextState to enable other methods to use it.
-class StrokeData {
+class PLATFORM_EXPORT StrokeData {
 public:
     StrokeData()
         : m_style(SolidStroke)