Clean up SkImageFilter constructors.

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 183 matching lines @@
     /**
      *  Returns the currently-set external cache, or NULL if none is set.
      */
     static Cache* GetExternalCache();
 
     SK_DEFINE_FLATTENABLE_TYPE(SkImageFilter)
 
 protected:
     SkImageFilter(int inputCount, SkImageFilter** inputs, const CropRect* cropRect = NULL);
 
-    // Convenience constructor for 1-input filters.
-    explicit SkImageFilter(SkImageFilter* input, const CropRect* cropRect = NULL);
-
-    // Convenience constructor for 2-input filters.
-    SkImageFilter(SkImageFilter* input1, SkImageFilter* input2, const CropRect* cropRect = NULL);
-
     virtual ~SkImageFilter();
 
     /**
      *  Constructs a new SkImageFilter read from an SkReadBuffer object.
      *
      *  @param inputCount    The exact number of inputs expected for this SkImageFilter object.
      *                       -1 can be used if the filter accepts any number of inputs.
      *  @param rb            SkReadBuffer object from which the SkImageFilter is read.
      */
     explicit SkImageFilter(int inputCount, SkReadBuffer& rb);
@@ skipping 68 matching lines @@
                              const SkIRect& bounds) const;
 
 private:
     typedef SkFlattenable INHERITED;
     int fInputCount;
     SkImageFilter** fInputs;
     CropRect fCropRect;
 };
 
 #endif