Update SkSpecialImage to be able to create tight SkImages and SkSurfaces

src/core/SkSpecialImage.h

Index: src/core/SkSpecialImage.h
diff --git a/src/core/SkSpecialImage.h b/src/core/SkSpecialImage.h
index 47ad6ccab7972f7de6e2d698fc5f978d910963bc..778bf53449cda3f033c834231def324855e8c8d8 100644
--- a/src/core/SkSpecialImage.h
+++ b/src/core/SkSpecialImage.h
@@ -25,6 +25,7 @@ struct SkImageInfo;
 class SkPaint;
 class SkPixmap;
 class SkSpecialSurface;
+class SkSurface;
 
 enum {
     kNeedNewImageUniqueID_SpecialImage = 0
@@ -84,16 +85,29 @@ public:
                                                 ReleaseContext);
 
     /**
-     *  Create a new surface with a backend that is compatible with this image.
+     *  Create a new special surface with a backend that is compatible with this special image.
      */
     sk_sp<SkSpecialSurface> makeSurface(const SkImageInfo&) const;
 
     /**
+     * Create a new surface with a backend that is compatible with this special image.
+     * TODO: switch this to makeSurface once we resolved the naming issue
+     */
+    sk_sp<SkSurface> makeTightSurface(const SkImageInfo&) const;
+
+    /**
      * Extract a subset of this special image and return it as a special image.
      * It may or may not point to the same backing memory.
      */
     sk_sp<SkSpecialImage> makeSubset(const SkIRect& subset) const;
 
+    /**
+     * Extract a subset of this special image and return it as an SkImage.
+     * It may or may not point to the same backing memory.
+     * TODO: switch this to makeSurface once we resolved the naming issue
+     */
+    sk_sp<SkImage> makeTightSubset(const SkIRect& subset) const;
+
     // These three internal methods will go away (see skbug.com/4965)
     bool internal_getBM(SkBitmap* result);
     static sk_sp<SkSpecialImage> internal_fromBM(SkImageFilter::Proxy*, const SkBitmap&);