base: Remove the string logging from CHECK().

content/browser/webrtc/webrtc_getusermedia_browsertest.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 <stddef.h>
 
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/strings/stringprintf.h"
@@ skipping 90 matching lines @@
 
 class WebRtcGetUserMediaBrowserTest : public WebRtcContentBrowserTestBase {
  public:
   WebRtcGetUserMediaBrowserTest() : trace_log_(NULL) {
     // Automatically grant device permission.
     AppendUseFakeUIForMediaStreamFlag();
   }
   ~WebRtcGetUserMediaBrowserTest() override {}
 
   void StartTracing() {
-    CHECK(trace_log_ == NULL) << "Can only can start tracing once";
+    // Can only can start tracing once
+    CHECK(trace_log_ == NULL);
     trace_log_ = base::trace_event::TraceLog::GetInstance();
     base::trace_event::TraceConfig trace_config(
         "video", base::trace_event::RECORD_UNTIL_FULL);
     trace_log_->SetEnabled(trace_config,
                            base::trace_event::TraceLog::RECORDING_MODE);
     // Check that we are indeed recording.
     EXPECT_EQ(trace_log_->GetNumTracesRecorded(), 1);
   }
 
   void StopTracing() {
-    CHECK(message_loop_runner_.get() == NULL)
-        << "Calling StopTracing more than once";
+    // Calling StopTracing more than once
+    CHECK(message_loop_runner_.get() == NULL);
 
     {
       base::ThreadRestrictions::ScopedAllowIO allow_thread_join_caused_by_test;
       trace_log_->SetDisabled();
     }
 
     message_loop_runner_ = new MessageLoopRunner;
     trace_log_->Flush(base::Bind(
         &WebRtcGetUserMediaBrowserTest::OnTraceDataCollected,
         base::Unretained(this)));
@@ skipping 623 matching lines @@
       base::Bind(&VerifyDisableLocalEcho, true));
   call = GenerateGetUserMediaWithDisableLocalEcho(
       "getUserMediaAndExpectSuccess", "true");
   ExecuteJavascriptAndWaitForOk(call);
 
   manager->SetGenerateStreamCallbackForTesting(
       MediaStreamManager::GenerateStreamTestCallback());
 }
 
 }  // namespace content