Add toString methods to SkImageFilter-derived classes

include/effects/SkMatrixConvolutionImageFilter.h

 /*
  * Copyright 2012 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 SkMatrixConvolutionImageFilter_DEFINED
 #define SkMatrixConvolutionImageFilter_DEFINED
 
@@ skipping 45 matching lines @@
                                                   const SkScalar* kernel,
                                                   SkScalar gain,
                                                   SkScalar bias,
                                                   const SkIPoint& kernelOffset,
                                                   TileMode tileMode,
                                                   bool convolveAlpha,
                                                   SkImageFilter* input = NULL,
                                                   const CropRect* cropRect = NULL,
                                                   uint32_t uniqueID = 0);
 
+    SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkMatrixConvolutionImageFilter)
 
 protected:
     SkMatrixConvolutionImageFilter(const SkISize& kernelSize,
                                    const SkScalar* kernel,
                                    SkScalar gain,
                                    SkScalar bias,
                                    const SkIPoint& kernelOffset,
                                    TileMode tileMode,
                                    bool convolveAlpha,
@@ skipping 36 matching lines @@
                               SkBitmap* result,
                               const SkIRect& rect,
                               const SkIRect& bounds) const;
     void filterBorderPixels(const SkBitmap& src,
                             SkBitmap* result,
                             const SkIRect& rect,
                             const SkIRect& bounds) const;
 };
 
 #endif