base: Remove the string logging from CHECK().

net/spdy/fuzzing/hpack_example_generator.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/at_exit.h"
 #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 34 matching lines @@
   }
   string file_to_write = command_line.GetSwitchValueASCII(kFileToWrite);
 
   int example_count = 0;
   base::StringToInt(command_line.GetSwitchValueASCII(kExampleCount),
                     &example_count);
 
   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());
 
   HpackFuzzUtil::GeneratorContext context;
   HpackFuzzUtil::InitializeGeneratorContext(&context);
   net::HpackEncoder encoder(net::ObtainHpackHuffmanTable());
 
   for (int i = 0; i != example_count; ++i) {
     net::SpdyHeaderBlock headers =
         HpackFuzzUtil::NextGeneratedHeaderSet(&context);
 
     string buffer;
     CHECK(encoder.EncodeHeaderSet(headers, &buffer));
 
     string prefix = HpackFuzzUtil::HeaderBlockPrefix(buffer.size());
 
     CHECK_LT(0, file_out.WriteAtCurrentPos(prefix.data(), prefix.size()));
     CHECK_LT(0, file_out.WriteAtCurrentPos(buffer.data(), buffer.size()));
   }
   CHECK(file_out.Flush());
   DVLOG(1) << "Generated " << example_count << " blocks.";
   return 0;
 }