Add four_byte_interp benches.

gyp/bench.gyp

 # GYP file to build performance testbench.
 #
 {
   'includes': [
     'apptype_console.gypi',
   ],
   'targets': [
     {
       'target_name': 'bench',
       'type': 'executable',
@@ skipping 15 matching lines @@
         '../bench/BitmapScaleBench.cpp',
         '../bench/BlurBench.cpp',
         '../bench/BlurImageFilterBench.cpp',
         '../bench/BlurRectBench.cpp',
         '../bench/BlurRoundRectBench.cpp',
         '../bench/ChartBench.cpp',
         '../bench/ChecksumBench.cpp',
         '../bench/ChromeBench.cpp',
         '../bench/CmapBench.cpp',
         '../bench/ColorFilterBench.cpp',
+        '../bench/ColorPrivBench.cpp',
         '../bench/CoverageBench.cpp',
         '../bench/DashBench.cpp',
         '../bench/DecodeBench.cpp',
         '../bench/DeferredCanvasBench.cpp',
         '../bench/DeferredSurfaceCopyBench.cpp',
         '../bench/DisplacementBench.cpp',
         '../bench/FSRectBench.cpp',
         '../bench/FontCacheBench.cpp',
         '../bench/FontScalerBench.cpp',
         '../bench/GameBench.cpp',
@@ skipping 115 matching lines @@
       ],
     }
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: