base: Remove the string logging from CHECK().

services/service_manager/standalone/tracer.cc

 // Copyright 2015 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 "services/service_manager/standalone/tracer.h"
 
 #include <stddef.h>
 #include <stdio.h>
 #include <string.h>
 #include <utility>
@@ skipping 22 matching lines @@
   tracing_ = true;
   trace_filename_ = filename;
   categories_ = categories;
   base::trace_event::TraceConfig config(categories,
                                         base::trace_event::RECORD_UNTIL_FULL);
   base::trace_event::TraceLog::GetInstance()->SetEnabled(
       config, base::trace_event::TraceLog::RECORDING_MODE);
 
   int trace_duration_secs = 5;
   if (!duration_seconds_str.empty()) {
-    CHECK(base::StringToInt(duration_seconds_str, &trace_duration_secs))
-        << "Could not parse --trace-startup-duration value "
-        << duration_seconds_str;
+    // Could not parse --trace-startup-duration value |duration_seconds_str|.
+    CHECK(base::StringToInt(duration_seconds_str, &trace_duration_secs));
   }
   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
       FROM_HERE,
       base::Bind(&Tracer::StopAndFlushToFile, base::Unretained(this)),
       base::TimeDelta::FromSeconds(trace_duration_secs));
 }
 
 void Tracer::StartCollectingFromTracingService(
     tracing::mojom::CollectorPtr coordinator) {
   coordinator_ = std::move(coordinator);
@@ skipping 96 matching lines @@
   WriteFooterAndClose();
 }
 
 void Tracer::WriteCommaIfNeeded() {
   if (first_chunk_written_)
     PCHECK(fwrite(",", 1, 1, trace_file_) == 1);
   first_chunk_written_ = true;
 }
 
 }  // namespace service_manager