add const to encodePixels pixel parameter

src/images/SkImageEncoder.cpp

 /*
  * Copyright 2009 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkImageEncoder.h"
 #include "SkBitmap.h"
 #include "SkStream.h"
@@ skipping 32 matching lines @@
 bool SkImageEncoder::EncodeStream(SkWStream* stream, const SkBitmap& bm, Type t,
                                   int quality) {
     SkAutoTDelete<SkImageEncoder> enc(SkImageEncoder::Create(t));
     return enc.get() && enc.get()->encodeStream(stream, bm, quality);
 }
 
 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 SkImageInfo& info, const void* pixels, size_t rowBytes,
+                                   Type t, int quality) {
+    SkBitmap bm;
+    if (!bm.installPixels(info, const_cast<void*>(pixels), rowBytes)) {
+        return NULL;
+    }
+    SkAutoTDelete<SkImageEncoder> enc(SkImageEncoder::Create(t));
+    return enc.get() ? enc.get()->encodeData(bm, quality) : NULL;
+}