Add toString methods to SkImageFilter-derived classes

include/effects/SkPictureImageFilter.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 SkPictureImageFilter_DEFINED
 #define SkPictureImageFilter_DEFINED
 
@@ skipping 28 matching lines @@
      *  dest rect; only the CTM is applied.)
      */
     static SkPictureImageFilter* CreateForLocalSpace(const SkPicture* picture,
                                                      const SkRect& cropRect,
                                                      SkPaint::FilterLevel filterLevel,
                                                      uint32_t uniqueID = 0) {
         return SkNEW_ARGS(SkPictureImageFilter, (picture, cropRect, uniqueID,
                                                  kLocalSpace_PictureResolution, filterLevel));
     }
 
+    SK_TO_STRING_OVERRIDE()
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPictureImageFilter)
 
 protected:
     enum PictureResolution {
         kDeviceSpace_PictureResolution,
         kLocalSpace_PictureResolution
     };
 
     explicit SkPictureImageFilter(const SkPicture* picture, uint32_t uniqueID);
     SkPictureImageFilter(const SkPicture* picture, const SkRect& cropRect, uint32_t uniqueID,
@@ skipping 18 matching lines @@
                                       const Context&) const;
 
     const SkPicture*      fPicture;
     SkRect                fCropRect;
     PictureResolution     fPictureResolution;
     SkPaint::FilterLevel  fFilterLevel;
     typedef SkImageFilter INHERITED;
 };
 
 #endif