Move SkMatrixImageFilter into core, and add a factory fn for it.

include/effects/SkMatrixImageFilter.h

Index: include/effects/SkMatrixImageFilter.h
diff --git a/include/effects/SkMatrixImageFilter.h b/include/effects/SkMatrixImageFilter.h
deleted file mode 100644
index 2c11aa63a315a6240db47ac995b9edf202421bd0..0000000000000000000000000000000000000000
--- a/include/effects/SkMatrixImageFilter.h
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * Copyright 2014 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 SkMatrixImageFilter_DEFINED
-#define SkMatrixImageFilter_DEFINED
-
-#include "SkImageFilter.h"
-#include "SkScalar.h"
-#include "SkSize.h"
-#include "SkPoint.h"
-#include "SkPaint.h"
-
-/*! \class SkMatrixImageFilter
-    Matrix transformation image filter.  This filter draws its source
-    input transformed by the given matrix.
- */
-
-class SK_API SkMatrixImageFilter : public SkImageFilter {
-public:
-    /** Construct a 2D transformation image filter.
-     *  @param transform    The matrix to apply when drawing the src bitmap
-     *  @param filterLevel  The quality of filtering to apply when scaling.
-     *  @param input        The input image filter.  If NULL, the src bitmap
-     *                      passed to filterImage() is used instead.
-     */
-
-    static SkMatrixImageFilter* Create(const SkMatrix& transform,
-                                       SkFilterQuality,
-                                       SkImageFilter* input = NULL);
-#ifdef SK_SUPPORT_LEGACY_FILTERLEVEL_ENUM
-    static SkMatrixImageFilter* Create(const SkMatrix& transform,
-                                       SkPaint::FilterLevel level,
-                                       SkImageFilter* input = NULL) {
-        return Create(transform, SkFilterQuality(level), input);
-    }
-#endif
-    virtual ~SkMatrixImageFilter();
-
-    void computeFastBounds(const SkRect&, SkRect*) const SK_OVERRIDE;
-
-    SK_TO_STRING_OVERRIDE()
-    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkMatrixImageFilter)
-
-protected:
-    SkMatrixImageFilter(const SkMatrix& transform,
-                        SkFilterQuality,
-                        SkImageFilter* input);
-    void flatten(SkWriteBuffer&) const SK_OVERRIDE;
-
-    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&,
-                               SkBitmap* result, SkIPoint* loc) const SK_OVERRIDE;
-    virtual bool onFilterBounds(const SkIRect& src, const SkMatrix&,
-                                SkIRect* dst) const SK_OVERRIDE;
-
-private:
-    SkMatrix              fTransform;
-    SkFilterQuality       fFilterQuality;
-    typedef SkImageFilter INHERITED;
-};
-
-#endif