Revert of Add SkCodec, including PNG implementation. (patchset #24 id:460001 of https://codereview.chromium.org/930283002/)

Reason for revert:
Breaking windows bots all over the place :(

Original issue's description:
> Add SkCodec, including PNG implementation.
>
> DM:
> Add a flag to use SkCodec instead of SkImageDecoder.
>
> SkCodec:
> Base class for codecs, allowing creation from an SkStream or an SkData.
> An SkCodec, on creation, knows properties of the data like its width and height. Further calls can be used to generate the image.
> TODO: Add scanline iterator
>
> SkPngCodec:
> New decoder for png. Wraps libpng. The code has been repurposed from SkImageDecoder_libpng.
> TODO: Handle other destination colortypes
> TODO: Substitute the transpose color
> TODO: Allow silencing warnings
> TODO: Use RGB instead of filler?
> TODO: sRGB
>
> SkSwizzler:
> Simplified version of SkScaledSampler. Unlike the sampler, this object does no sampling.
> TODO: Implement other swizzles.
>
> BUG=skia:3257
>
> Committed: https://skia.googlesource.com/skia/+/ca358852b4fed656d11107b2aaf28318a4518b49

TBR=reed@google.com,djsollen@google.com,msarett@google.com,mtklein@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:3257

Review URL: https://codereview.chromium.org/972743003

1 files changed, 0 insertions, 34 deletions

diff --git a/src/codec/SkCodec_libpng.h b/src/codec/SkCodec_libpng.h
deleted file mode 100644
index a5327dda41..0000000000
--- a/src/codec/SkCodec_libpng.h
+++ /dev/null
@@ -1,34 +0,0 @@
-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkCodec.h"
-#include "SkImageInfo.h"
-
-extern "C" {
-    // FIXME: I'd like to force all platforms to use the same decoder, but this
-    // means an extra dependency on Mac/Win.
-    #include "png.h"
-}
-
-class SkStream;
-
-class SkPngCodec : public SkCodec {
-public:
-    // Assumes IsPng was called and returned true.
-    static SkCodec* NewFromStream(SkStream*);
-    static bool IsPng(SkStream*);
-protected:
-    Result onGetPixels(const SkImageInfo&, void*, size_t, SkPMColor*, int*) SK_OVERRIDE;
-private:
-    png_structp             fPng_ptr;
-    png_infop               fInfo_ptr;
-
-    SkPngCodec(const SkImageInfo&, SkStream*, png_structp, png_infop);
-    ~SkPngCodec();
-
-    typedef SkCodec INHERITED;
-};