base: Remove the string logging from CHECK().

chrome/browser/media/webrtc/webrtc_browsertest_perf.cc

 // Copyright 2013 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 "chrome/browser/media/webrtc/webrtc_browsertest_perf.h"
 
 #include <stddef.h>
 
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
@@ skipping 167 matching lines @@
       "video_rx", modifier, "goog_jitter_buffer_ms", value, "ms", false);
   EXPECT_TRUE(pc_dict.GetString(Statistic("googRenderDelayMs", ssrc), &value));
   perf_test::PrintResult(
       "video_rx", modifier, "goog_render_delay_ms", value, "ms", false);
 }
 
 static std::string ExtractSsrcIdentifier(const std::string& key) {
   // Example key: ssrc_1234-someStatName. Grab the part before the dash.
   size_t key_start_pos = 0;
   size_t key_end_pos = key.find("-");
-  CHECK(key_end_pos != std::string::npos) << "Could not parse key " << key;
+  // Could not parse key |key|
+  CHECK(key_end_pos != std::string::npos);
   return key.substr(key_start_pos, key_end_pos - key_start_pos);
 }
 
 // Returns the set of unique ssrc identifiers in the call (e.g. ssrc_1234,
 // ssrc_12356, etc). |stats_dict| is the .stats dict from one peer connection.
 static std::set<std::string> FindAllSsrcIdentifiers(
     const base::DictionaryValue& stats_dict) {
   std::set<std::string> result;
   base::DictionaryValue::Iterator stats_iterator(stats_dict);
 
@@ skipping 73 matching lines @@
   std::set<std::string>::const_iterator ssrc_iterator =
       ssrc_identifiers.begin();
   for (; ssrc_iterator != ssrc_identifiers.end(); ++ssrc_iterator) {
     const std::string& ssrc = *ssrc_iterator;
     MaybePrintResultsForAudioReceive(ssrc, pc_dict, modifier);
     MaybePrintResultsForVideoReceive(ssrc, pc_dict, video_modifier);
   }
 }
 
 }  // namespace test