simplify handle-affine: subclass overrides just describe their leaf behavior

include/effects/SkComposeImageFilter.h

 /*
  * 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 SkComposeImageFilter_DEFINED
 #define SkComposeImageFilter_DEFINED
 
@@ skipping 16 matching lines @@
 #endif
 
 protected:
     explicit SkComposeImageFilter(sk_sp<SkImageFilter> inputs[2]) : INHERITED(inputs, 2, nullptr) {
         SkASSERT(inputs[0].get());
         SkASSERT(inputs[1].get());
     }
     sk_sp<SkSpecialImage> onFilterImage(SkSpecialImage* source, const Context&,
                                         SkIPoint* offset) const override;
     SkIRect onFilterBounds(const SkIRect&, const SkMatrix&, MapDirection) const override;
+    bool onCanHandleComplexCTM() const override { return true; }
 
 private:
     typedef SkImageFilter INHERITED;
 };
 
 #endif