Revert of Initial picture shader implementation

src/core/SkPictureShader.h

Index: src/core/SkPictureShader.h
diff --git a/src/core/SkPictureShader.h b/src/core/SkPictureShader.h
deleted file mode 100644
index ea74b56d73d857394f9c20b227d41368f1623fa0..0000000000000000000000000000000000000000
--- a/src/core/SkPictureShader.h
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef SkPictureShader_DEFINED
-#define SkPictureShader_DEFINED
-
-#include "SkShader.h"
-
-class SkBitmap;
-class SkPicture;
-
-/*
- * An SkPictureShader can be used to draw SkPicture-based patterns.
- *
- * The SkPicture is first rendered into a tile, which is then used to shade the area according
- * to specified tiling rules.
- */
-class SkPictureShader : public SkShader {
-public:
-    static SkPictureShader* Create(SkPicture*, TileMode, TileMode);
-    virtual ~SkPictureShader();
-
-    virtual bool setContext(const SkBitmap&, const SkPaint&, const SkMatrix&) SK_OVERRIDE;
-    virtual void endContext() SK_OVERRIDE;
-    virtual uint32_t getFlags() SK_OVERRIDE;
-
-    virtual ShadeProc asAShadeProc(void** ctx) SK_OVERRIDE;
-    virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count) SK_OVERRIDE;
-    virtual void shadeSpan16(int x, int y, uint16_t dstC[], int count) SK_OVERRIDE;
-
-    SK_TO_STRING_OVERRIDE()
-    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPictureShader)
-
-#if SK_SUPPORT_GPU
-    GrEffectRef* asNewEffect(GrContext*, const SkPaint&) const SK_OVERRIDE;
-#endif
-
-protected:
-    SkPictureShader(SkReadBuffer&);
-    virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
-
-private:
-    SkPictureShader(SkPicture*, TileMode, TileMode);
-
-    bool buildBitmapShader(const SkMatrix&) const;
-
-    SkPicture*  fPicture;
-    TileMode    fTmx, fTmy;
-
-    mutable SkAutoTUnref<SkShader>  fCachedShader;
-    mutable SkSize                  fCachedTileScale;
-
-    typedef SkShader INHERITED;
-};
-
-#endif // SkPictureShader_DEFINED