nanobench does not need to handle failed rewind.

bench/nanobench.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <ctype.h>
 
 #include "nanobench.h"
@@ skipping 643 matching lines @@
                 const SkImageGenerator::Result result = codec->getPixels(
                         bitmap.info(), bitmap.getPixels(), bitmap.rowBytes());
                 switch (result) {
                     case SkImageGenerator::kSuccess:
                     case SkImageGenerator::kIncompleteInput:
                         return new CodecBench(SkOSPath::Basename(path.c_str()),
                                 encoded, colorType);
                     case SkImageGenerator::kInvalidConversion:
                         // This is okay. Not all conversions are valid.
                         break;
-                    case SkImageGenerator::kCouldNotRewind:
-                        // FIXME: This is due to a bug in some implementations
-                        // of SkCodec. All should support rewinding.
-                        break;
                     default:
                         // This represents some sort of failure.
                         SkASSERT(false);
                         break;
                 }
             }
             fCurrentColorType = 0;
         }
 
         // Run the DecodingBenches
@@ skipping 301 matching lines @@
 
     return 0;
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     return nanobench_main();
 }
 #endif