Remove SkBlendImageFilter, and all tests. Its functionality has been subsumed by SkXfermodeImageFil…

include/effects/SkBlendImageFilter.h

-/*
- * Copyright 2012 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.
- */
-
-#ifndef SkBlendImageFilter_DEFINED
-#define SkBlendImageFilter_DEFINED
-
-#include "SkImageFilter.h"
-#include "SkBitmap.h"
-
-class SK_API SkBlendImageFilter : public SkImageFilter {
-public:
-    enum Mode {
-      kNormal_Mode,
-      kMultiply_Mode,
-      kScreen_Mode,
-      kDarken_Mode,
-      kLighten_Mode,
-    };
-    SkBlendImageFilter(Mode mode, SkImageFilter* background, SkImageFilter* foreground = NULL);
-
-    ~SkBlendImageFilter();
-
-    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBlendImageFilter)
-
-    virtual bool onFilterImage(Proxy* proxy,
-                               const SkBitmap& src,
-                               const SkMatrix& ctm,
-                               SkBitmap* dst,
-                               SkIPoint* offset) SK_OVERRIDE;
-#if SK_SUPPORT_GPU
-    virtual bool canFilterImageGPU() const SK_OVERRIDE { return true; }
-    virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, SkBitmap* result,
-                                SkIPoint* offset) SK_OVERRIDE;
-#endif
-
-protected:
-    explicit SkBlendImageFilter(SkFlattenableReadBuffer& buffer);
-    virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
-
-private:
-    Mode fMode;
-    typedef SkImageFilter INHERITED;
-    SkImageFilter* getBackgroundInput() { return getInput(0); }
-    SkImageFilter* getForegroundInput() { return getInput(1); }
-};
-
-#endif