GM: add fadefilter gm

gyp/gmslides.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 the golden master slides.
 {
   'include_dirs': [
     '../gm',
     # include dirs needed by particular GMs
     '../src/utils/debugger',
@@ skipping 75 matching lines @@
         '../gm/drawbitmaprect.cpp',
         '../gm/drawfilter.cpp',
         '../gm/drawlooper.cpp',
         '../gm/dropshadowimagefilter.cpp',
         '../gm/drrect.cpp',
         '../gm/dstreadshuffle.cpp',
         '../gm/etc1bitmap.cpp',
         '../gm/extractbitmap.cpp',
         '../gm/emboss.cpp',
         '../gm/emptypath.cpp',
+        '../gm/fadefilter.cpp',
         '../gm/fatpathfill.cpp',
         '../gm/factory.cpp',
         '../gm/filltypes.cpp',
         '../gm/filltypespersp.cpp',
         '../gm/filterbitmap.cpp',
         '../gm/filterfastbounds.cpp',
         '../gm/filterindiabox.cpp',
         '../gm/fontcache.cpp',
         '../gm/fontmgr.cpp',
         '../gm/fontscaler.cpp',
@@ skipping 160 matching lines @@
         '../gm/shadertext2.cpp',
         '../gm/shadertext3.cpp',
 
         # TODO(reed): Allocates more memory than Android devices are capable of
         # fulfilling. See http://skbug.com/1978
         '../gm/verylargebitmap.cpp',
       ],
     }],
   ],
 }