base: Remove the string logging from CHECK().

net/spdy/fuzzing/hpack_fuzz_mutator.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/command_line.h"
 #include "base/files/file.h"
 #include "base/files/file_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "net/spdy/fuzzing/hpack_fuzz_util.h"
 
@@ skipping 39 matching lines @@
                     &flip_ratio));
 
   DVLOG(1) << "Reading input from " << file_to_parse;
   HpackFuzzUtil::Input input;
   CHECK(base::ReadFileToString(base::FilePath::FromUTF8Unsafe(file_to_parse),
                                &input.input));
 
   DVLOG(1) << "Writing output to " << file_to_write;
   base::File file_out(base::FilePath::FromUTF8Unsafe(file_to_write),
                       base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_WRITE);
-  CHECK(file_out.IsValid()) << file_out.error_details();
+  CHECK(file_out.IsValid());
 
   DVLOG(1) << "Flipping " << flip_ratio << " bits per 1024 input bytes";
 
   size_t block_count = 0;
   StringPiece block;
   while (HpackFuzzUtil::NextHeaderBlock(&input, &block)) {
     HpackFuzzUtil::FlipBits(
         reinterpret_cast<uint8_t*>(const_cast<char*>(block.data())),
         block.size(), flip_ratio);
 
     string prefix = HpackFuzzUtil::HeaderBlockPrefix(block.size());
 
     CHECK_LT(0, file_out.WriteAtCurrentPos(prefix.data(), prefix.size()));
     CHECK_LT(0, file_out.WriteAtCurrentPos(block.data(), block.size()));
     ++block_count;
   }
   CHECK(file_out.Flush());
   DVLOG(1) << "Mutated " << block_count << " blocks.";
   return 0;
 }