Move SkImage::encode to SkImageEncoder

src/images/SkImageEncoder.cpp

Index: src/images/SkImageEncoder.cpp
diff --git a/src/images/SkImageEncoder.cpp b/src/images/SkImageEncoder.cpp
index 31fdcf96042eaf6c701e000e14307be0f5c92391..6886009257f18f8501f41f30f7c9125286ea63a9 100644
--- a/src/images/SkImageEncoder.cpp
+++ b/src/images/SkImageEncoder.cpp
@@ -7,6 +7,7 @@
 
 #include "SkImageEncoder.h"
 #include "SkBitmap.h"
+#include "SkImage.h"
 #include "SkStream.h"
 #include "SkTemplates.h"
 
@@ -40,6 +41,8 @@ bool SkImageEncoder::EncodeFile(const char file[], const SkBitmap& bm, Type t,
     return enc.get() && enc.get()->encodeFile(file, bm, quality);
 }
 
+
+
 bool SkImageEncoder::EncodeStream(SkWStream* stream, const SkBitmap& bm, Type t,
                                   int quality) {
     SkAutoTDelete<SkImageEncoder> enc(SkImageEncoder::Create(t));
@@ -50,3 +53,12 @@ SkData* SkImageEncoder::EncodeData(const SkBitmap& bm, Type t, int quality) {
     SkAutoTDelete<SkImageEncoder> enc(SkImageEncoder::Create(t));
     return enc.get() ? enc.get()->encodeData(bm, quality) : NULL;
 }
+
+SkData* SkImageEncoder::EncodeData(const SkImage& image, Type type, int quality) {
+    SkBitmap bm;
+    if (image.getBitmapForEncoding(&bm)) {
+        return SkImageEncoder::EncodeData(bm, type, quality);
+    }
+    return NULL;
+}
+