Remove SkImageFilter::getInputResult(), since its return value is not

include/core/SkImageFilter.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkImageFilter_DEFINED
 #define SkImageFilter_DEFINED
 
@@ skipping 141 matching lines @@
     explicit SkImageFilter(SkFlattenableReadBuffer& rb);
 
     virtual void flatten(SkFlattenableWriteBuffer& wb) const SK_OVERRIDE;
 
     // Default impl returns false
     virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&,
                                SkBitmap* result, SkIPoint* offset);
     // Default impl copies src into dst and returns true
     virtual bool onFilterBounds(const SkIRect&, const SkMatrix&, SkIRect*);
 
-    // Return the result of processing the given input, or the source bitmap
-    // if we have no connected input at that index.
-    SkBitmap getInputResult(int index, Proxy*, const SkBitmap& src, const SkMatrix&,
-                            SkIPoint*);
-
 private:
     typedef SkFlattenable INHERITED;
     int fInputCount;
     SkImageFilter** fInputs;
 };
 
 #endif