add const to encodePixels pixel parameter

src/core/SkPicture.cpp

 /*
  * Copyright 2007 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 "SkPictureFlat.h"
 #include "SkPictureData.h"
@@ skipping 447 matching lines @@
 // Mimics the old behavior of always accepting the encoded data, and encoding
 // using EncodeBitmap if there was no encoded data.
 class EncodeBitmapSerializer : public SkPixelSerializer {
 public:
     explicit EncodeBitmapSerializer(SkPicture::EncodeBitmap encoder)
     : fEncoder(encoder)
     {
         SkASSERT(fEncoder);
     }
 
-    virtual bool onUseEncodedData(const void*, size_t) SK_OVERRIDE { return true; }
+    bool onUseEncodedData(const void*, size_t) SK_OVERRIDE { return true; }
 
-    virtual SkData* onEncodePixels(const SkImageInfo& info, void* pixels,
+    SkData* onEncodePixels(const SkImageInfo& info, const void* pixels,
                                    size_t rowBytes) SK_OVERRIDE {
         // Required by signature of EncodeBitmap.
         size_t unused;
         SkBitmap bm;
         bm.installPixels(info, pixels, rowBytes);
         return fEncoder(&unused, bm);
     }
 
 private:
     SkPicture::EncodeBitmap fEncoder;
@@ skipping 51 matching lines @@
 
 SkPicture::SkPicture(const SkRect& cullRect, SkRecord* record, SnapshotArray* drawablePicts,
                      SkBBoxHierarchy* bbh)
     : fUniqueID(next_picture_generation_id())
     , fCullRect(cullRect)
     , fRecord(SkRef(record))
     , fBBH(SkSafeRef(bbh))
     , fDrawablePicts(drawablePicts)     // take ownership
     , fAnalysis(*fRecord)
 {}