remove DownSample imagefilter

gyp/effects.gypi

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 # Include this gypi to include all 'effects' files
 # The parent gyp/gypi file must define:
 #       'skia_src_path'     e.g. skia/trunk/src
 #       'skia_include_path' e.g. skia/trunk/include
 #
 # The skia build defines these in common_variables.gypi.
@@ skipping 44 matching lines @@
     '<(skia_src_path)/effects/SkMorphologyImageFilter.cpp',
     '<(skia_src_path)/effects/SkOffsetImageFilter.cpp',
     '<(skia_src_path)/effects/SkPackBits.cpp',
     '<(skia_src_path)/effects/SkPackBits.h',
     '<(skia_src_path)/effects/SkPaintFlagsDrawFilter.cpp',
     '<(skia_src_path)/effects/SkPaintImageFilter.cpp',
     '<(skia_src_path)/effects/SkPerlinNoiseShader.cpp',
     '<(skia_src_path)/effects/SkPictureImageFilter.cpp',
     '<(skia_src_path)/effects/SkTableColorFilter.cpp',
     '<(skia_src_path)/effects/SkTableMaskFilter.cpp',
-    '<(skia_src_path)/effects/SkTestImageFilters.cpp',
     '<(skia_src_path)/effects/SkTileImageFilter.cpp',
     '<(skia_src_path)/effects/SkXfermodeImageFilter.cpp',
 
     '<(skia_src_path)/effects/gradients/Sk4fGradientBase.cpp',
     '<(skia_src_path)/effects/gradients/Sk4fGradientBase.h',
     '<(skia_src_path)/effects/gradients/Sk4fGradientPriv.h',
     '<(skia_src_path)/effects/gradients/Sk4fLinearGradient.cpp',
     '<(skia_src_path)/effects/gradients/Sk4fLinearGradient.h',
     '<(skia_src_path)/effects/gradients/SkClampRange.cpp',
     '<(skia_src_path)/effects/gradients/SkClampRange.h',
@@ skipping 40 matching lines @@
     '<(skia_include_path)/effects/SkOffsetImageFilter.h',
     '<(skia_include_path)/effects/SkPaintFlagsDrawFilter.h',
     '<(skia_include_path)/effects/SkPaintImageFilter.h',
     '<(skia_include_path)/effects/SkPerlinNoiseShader.h',
     '<(skia_include_path)/effects/SkTableColorFilter.h',
     '<(skia_include_path)/effects/SkTableMaskFilter.h',
     '<(skia_include_path)/effects/SkTileImageFilter.h',
     '<(skia_include_path)/effects/SkXfermodeImageFilter.h',
   ],
 }