Change signatures of filter bounds methods to return a rect.

src/core/SkMatrixImageFilter.h

 /*
  * 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
 
@@ skipping 15 matching lines @@
      *  @param filterLevel  The quality of filtering to apply when scaling.
      *  @param input        The input image filter.  If nullptr, the src bitmap
      *                      passed to filterImage() is used instead.
      */
 
     static SkMatrixImageFilter* Create(const SkMatrix& transform,
                                        SkFilterQuality,
                                        SkImageFilter* input = nullptr);
     virtual ~SkMatrixImageFilter();
 
-    void computeFastBounds(const SkRect&, SkRect*) const override;
+    SkRect computeFastBounds(const SkRect&) const override;
 
     SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkMatrixImageFilter)
 
 protected:
     SkMatrixImageFilter(const SkMatrix& transform,
                         SkFilterQuality,
                         SkImageFilter* input);
     void flatten(SkWriteBuffer&) const override;
 
     bool onFilterImageDeprecated(Proxy*, const SkBitmap& src, const Context&,
                                  SkBitmap* result, SkIPoint* loc) const override;
-    void onFilterNodeBounds(const SkIRect& src, const SkMatrix&,
-                            SkIRect* dst, MapDirection) const override;
+    SkIRect onFilterNodeBounds(const SkIRect& src, const SkMatrix&, MapDirection) const override;
 
 private:
     SkMatrix              fTransform;
     SkFilterQuality       fFilterQuality;
     typedef SkImageFilter INHERITED;
 };
 
 #endif