base: Remove the string logging from CHECK().

extensions/renderer/native_handler.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 "extensions/renderer/native_handler.h"
 
 #include "base/logging.h"
 
 namespace extensions {
 
 NativeHandler::NativeHandler() : is_valid_(true) {}
 
 NativeHandler::~NativeHandler() {
-  CHECK(!is_valid_) << "NativeHandlers must be invalidated before destruction";
+  // NativeHandlers must be invalidated before destruction
+  CHECK(!is_valid_);
 }
 
 void NativeHandler::Invalidate() {
   CHECK(is_valid_);
   is_valid_ = false;
 }
 
 }  // namespace extensions