Moving 4 SkImageFilter derived classes from blink to skia

include/effects/SkCompositeImageFilter.h

+/*
+ * Copyright 2013 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 SkCompositeImageFilter_DEFINED
+#define SkCompositeImageFilter_DEFINED
+
+#include "SkImageFilter.h"
+#include "SkXfermode.h"
+
+class SkCompositeImageFilter : public SkImageFilter {
+    typedef SkImageFilter INHERITED;
+
+public:
+    SkCompositeImageFilter(SkXfermode::Mode mode, SkImageFilter* background,
+        SkImageFilter* foreground, const SkIRect* cropRect) :
+        INHERITED(background, foreground, cropRect), fMode(mode) {}
+
+    virtual bool onFilterImage(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
+                               SkBitmap* dst, SkIPoint* offset) SK_OVERRIDE;
+
+    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkCompositeImageFilter)
+
+protected:
+    explicit SkCompositeImageFilter(SkFlattenableReadBuffer& buffer);
+    virtual void flatten(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE;
+
+private:
+    SkXfermode::Mode fMode;
+};
+
+#endif