Rearrange some includes for core/layout/svg/SVGText*

Source/core/layout/svg/LayoutSVGResourceMasker.h

Index: Source/core/layout/svg/LayoutSVGResourceMasker.h
diff --git a/Source/core/layout/svg/LayoutSVGResourceMasker.h b/Source/core/layout/svg/LayoutSVGResourceMasker.h
index cad7bb11ce2cdcf65a5f91f650b7ef8e169652de..5f8d2cf28c90211e9c900d36e148053cc56854d7 100644
--- a/Source/core/layout/svg/LayoutSVGResourceMasker.h
+++ b/Source/core/layout/svg/LayoutSVGResourceMasker.h
@@ -24,17 +24,12 @@
 #include "core/svg/SVGMaskElement.h"
 #include "core/svg/SVGUnitTypes.h"
 #include "platform/geometry/FloatRect.h"
-#include "platform/geometry/IntSize.h"
-#include "platform/graphics/ImageBuffer.h"
-
-#include "wtf/HashMap.h"
-#include "wtf/OwnPtr.h"
 
 class SkPicture;
-class AffineTransform;
 
 namespace blink {
 
+class AffineTransform;
 class GraphicsContext;
 
 class LayoutSVGResourceMasker final : public LayoutSVGResourceContainer {