Add timing SkCodec to nanobench.

gyp/bench.gyp

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 # GYP file to build performance testbench.
 #
 {
   'includes': [
     'apptype_console.gypi',
   ],
   'targets': [
     {
       'target_name': 'nanobench',
       'type': 'executable',
       'sources': [
         '../gm/gm.cpp',
+        '../bench/CodecBench.cpp',
         '../bench/DecodingBench.cpp',
         '../bench/DecodingSubsetBench.cpp',
         '../bench/GMBench.cpp',
         '../bench/RecordingBench.cpp',
         '../bench/SKPBench.cpp',
         '../bench/nanobench.cpp',
       ],
       'includes': [
         'bench.gypi',
         'gmslides.gypi',
@@ skipping 23 matching lines @@
             '../bench/nanobenchAndroid.cpp',
           ],
           'dependencies': [
             'utils.gyp:android_utils',
           ],
         }],
       ],
     },
   ],
 }