Revert "Implementation of image decoding for bmp files, in accordance with the new API."

src/codec/SkMaskSwizzler.h

-/*
- * 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 "SkMasks.h"
-#include "SkSwizzler.h"
-#include "SkTypes.h"
-
-/*
- *
- * Used to swizzle images whose pixel components are extracted by bit masks
- * Currently only used by bmp
- *
- */
-class SkMaskSwizzler {
-public:
-
-    /*
-     *
-     * Create a new swizzler
-     * @param masks Unowned pointer to helper class
-     *
-     */
-    static SkMaskSwizzler* CreateMaskSwizzler(const SkImageInfo& imageInfo,
-                                              SkMasks* masks,
-                                              uint32_t bitsPerPixel);
-
-    /*
-     *
-     * Swizzle the next row
-     *
-     */
-    SkSwizzler::ResultAlpha next(void* dst, const uint8_t* src);
-
-private:
-
-    /*
-     *
-     * Row procedure used for swizzle
-     *
-     */
-    typedef SkSwizzler::ResultAlpha (*RowProc)(
-            void* dstRow, const uint8_t* srcRow, int width,
-            SkMasks* masks);
-
-    /*
-     *
-     * Constructor for mask swizzler
-     *
-     */
-    SkMaskSwizzler(const SkImageInfo& info, SkMasks* masks, RowProc proc);
-
-    // Fields
-    const SkImageInfo& fImageInfo;
-    SkMasks*           fMasks;     // unowned
-    const RowProc      fRowProc;
-};