base: Remove the string logging from CHECK().

content/renderer/pepper/pepper_media_stream_video_track_host.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 "content/renderer/pepper/pepper_media_stream_video_track_host.h"
 
 #include <stddef.h>
 
 #include "base/base64.h"
 #include "base/logging.h"
@@ skipping 372 matching lines @@
     InitBuffers();
   }
 
   int32_t index = buffer_manager()->DequeueBuffer();
   // Drop frames if the underlying buffer is full.
   if (index < 0) {
     DVLOG(1) << "A frame is dropped.";
     return;
   }
 
-  CHECK_EQ(ppformat, source_frame_format_) << "Frame format is changed.";
+  // Frame format is changed.
+  CHECK_EQ(ppformat, source_frame_format_);
 
   gfx::Size size = GetTargetSize(source_frame_size_, plugin_frame_size_);
   ppformat =
       GetTargetFormat(source_frame_format_, plugin_frame_format_);
   ppapi::MediaStreamBuffer::Video* buffer =
       &(buffer_manager()->GetBufferPointer(index)->video);
   buffer->header.size = buffer_manager()->buffer_size();
   buffer->header.type = ppapi::MediaStreamBuffer::TYPE_VIDEO;
   buffer->timestamp = frame->timestamp().InSecondsF();
   buffer->format = ppformat;
@@ skipping 135 matching lines @@
 }
 
 void PepperMediaStreamVideoTrackHost::OnTrackStarted(
     MediaStreamSource* source,
     MediaStreamRequestResult result,
     const blink::WebString& result_name) {
   DVLOG(3) << "OnTrackStarted result: " << result;
 }
 
 }  // namespace content