Remove SkLerpXfermode

include/effects/SkLerpXfermode.h

Index: include/effects/SkLerpXfermode.h
diff --git a/include/effects/SkLerpXfermode.h b/include/effects/SkLerpXfermode.h
deleted file mode 100644
index 27daf78982d19afeb00f1741ba00935f3e2036a5..0000000000000000000000000000000000000000
--- a/include/effects/SkLerpXfermode.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef SkLerpXfermode_DEFINED
-#define SkLerpXfermode_DEFINED
-
-#include "SkXfermode.h"
-
-class SK_API SkLerpXfermode : public SkXfermode {
-public:
-    /**
-     *  result = scale * src + (1 - scale) * dst
-     *
-     *  When scale == 1, this is the same as kSrc_Mode
-     *  When scale == 0, this is the same as kDst_Mode
-     */
-    static SkXfermode* Create(SkScalar scale);
-
-    // overrides from SkXfermode
-    virtual void xfer32(SkPMColor dst[], const SkPMColor src[], int count,
-                        const SkAlpha aa[]) const override;
-    virtual void xfer16(uint16_t dst[], const SkPMColor src[], int count,
-                        const SkAlpha aa[]) const override;
-    virtual void xferA8(SkAlpha dst[], const SkPMColor src[], int count,
-                        const SkAlpha aa[]) const override;
-
-    SK_TO_STRING_OVERRIDE()
-    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkLerpXfermode)
-
-protected:
-    void flatten(SkWriteBuffer&) const override;
-
-private:
-    SkLerpXfermode(unsigned scale256);
-
-    unsigned fScale256;  // 0..256
-
-    SkValue asValue() const override;
-
-    typedef SkXfermode INHERITED;
-};
-
-#endif