IWYU: 'core' target, files starting A-C.

src/core/SkBlitter.h

Index: src/core/SkBlitter.h
diff --git a/src/core/SkBlitter.h b/src/core/SkBlitter.h
index a2ab89dc8ac3e46e01d31f41d55b352dcc28c711..baa9ccc39f878a171197808aa65c904c997e5170 100644
--- a/src/core/SkBlitter.h
+++ b/src/core/SkBlitter.h
@@ -9,14 +9,16 @@
 #define SkBlitter_DEFINED
 
 #include "SkBitmapProcShader.h"
-#include "SkMask.h"
-#include "SkMatrix.h"
-#include "SkPaint.h"
-#include "SkPixmap.h"
-#include "SkRefCnt.h"
+#include "SkColor.h"
+#include "SkRect.h"
 #include "SkRegion.h"
 #include "SkShader.h"
-#include "SkSmallAllocator.h"
+#include "SkTypes.h"
+
+class SkMatrix;
+class SkPaint;
+class SkPixmap;
+struct SkMask;
 
 /** SkBlitter and its subclasses are responsible for actually writing pixels
     into memory. Besides efficiency, they handle clipping and antialiasing.