Add ColorCodecSrc for testing/comparison on color corrected decodes

tools/flags/SkCommonFlags.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SK_COMMON_FLAGS_H
 #define SK_COMMON_FLAGS_H
 
 #include "../private/SkTArray.h"
 #include "SkCommandLineFlags.h"
 #include "SkString.h"
 
 DECLARE_bool(cpu);
 DECLARE_bool(dryRun);
 DECLARE_bool(gpu);
 DECLARE_string(images);
+DECLARE_string(colorImages);
 DECLARE_string(match);
 DECLARE_bool(quiet);
 DECLARE_bool(resetGpuContext);
 DECLARE_bool(preAbandonGpuContext);
 DECLARE_bool(abandonGpuContext);
 DECLARE_bool(releaseAndAbandonGpuContext);
 DECLARE_string(skps);
 DECLARE_int32(threads);
 DECLARE_string(resourcePath);
 DECLARE_bool(verbose);
 DECLARE_bool(veryVerbose);
 DECLARE_string(writePath);
 DECLARE_bool(pre_log);
 
 DECLARE_string(key);
 DECLARE_string(properties);
 
 /**
- *  Helper to assist in collecting image paths from --images.
+ *  Helper to assist in collecting image paths from |dir| specified through a command line flag.
  *
- *  Populates an array of strings with paths to images to test.
+ *  Populates |output|, an array of strings with paths to images to test.
  *
- *  Returns true if each argument to --images is meaningful:
+ *  Returns true if each argument to the images flag is meaningful:
  *  - If the file/directory does not exist, return false.
- *  - If a directory passed to --images does not have any supported images (based on file
- *  type), return false.
- *  - If a file is passed to --images, assume the user is deliberately testing this image,
- *  regardless of file type.
+ *  - If |dir| does not have any supported images (based on file type), return false.
+ *  - If |dir| is a single file, assume the user is deliberately testing this image,
+ *    regardless of file type.
  */
-bool CollectImages(SkTArray<SkString>*);
+bool CollectImages(SkCommandLineFlags::StringArray dir, SkTArray<SkString>* output);
 
 #endif