Remove SkEncodedInfo kPreSwizzled_Color from public API

src/codec/SkSwizzler.h

Index: src/codec/SkSwizzler.h
diff --git a/src/codec/SkSwizzler.h b/src/codec/SkSwizzler.h
index 070652cc8a4774bd5b672d39a4d80c736f49f82c..48450470486d54a5f54b0c3ec1d15a69ccf17dff 100644
--- a/src/codec/SkSwizzler.h
+++ b/src/codec/SkSwizzler.h
@@ -27,6 +27,9 @@ public:
      *                 Contains partial scanline information.
      *  @param frame   Is non-NULL if the source pixels are part of an image
      *                 frame that is a subset of the full image.
+     *  @param preSwizzled Indicates that the codec has already swizzled to the
+     *                     destination format.  The swizzler only needs to sample
+     *                     and/or subset.
      *
      *  Note that a deeper discussion of partial scanline subsets and image frame
      *  subsets is below.  Currently, we do not support both simultaneously.  If
@@ -36,7 +39,7 @@ public:
      */
     static SkSwizzler* CreateSwizzler(const SkEncodedInfo& encodedInfo, const SkPMColor* ctable,
                                       const SkImageInfo& dstInfo, const SkCodec::Options&,
-                                      const SkIRect* frame = nullptr);
+                                      const SkIRect* frame = nullptr, bool preSwizzled = false);
 
     /**
      *  Swizzle a line. Generally this will be called height times, once