Move SkImage::encode to SkImageEncoder

include/core/SkImageEncoder.h

Index: include/core/SkImageEncoder.h
diff --git a/include/core/SkImageEncoder.h b/include/core/SkImageEncoder.h
index 4d4d2a83c0f18a0bd31a8d42bd64d947703a8126..0a850fcdcb47b545c5dbd28f66aaf6b06663c9c5 100644
--- a/include/core/SkImageEncoder.h
+++ b/include/core/SkImageEncoder.h
@@ -13,6 +13,7 @@
 
 class SkBitmap;
 class SkData;
+class SkImage;
 class SkWStream;
 
 class SkImageEncoder {
@@ -60,6 +61,16 @@ public:
     bool encodeStream(SkWStream* stream, const SkBitmap& bm, int quality);
 
     static SkData* EncodeData(const SkBitmap&, Type, int quality);
+
+    /**
+     *  Encode the image's pixels and return the result as a new SkData, which
+     *  the caller must manage (i.e. call unref() when they are done).
+     *
+     *  If the image type cannot be encoded, or the requested encoder type is
+     *  not supported, this will return NULL.
+     */
+    static SkData* EncodeData(const SkImage&, Type, int quality);
+
     static bool EncodeFile(const char file[], const SkBitmap&, Type,
                            int quality);
     static bool EncodeStream(SkWStream*, const SkBitmap&, Type,