[chrome/browser/e*-i*] favor DCHECK_CURRENTLY_ON for better logs

chrome/browser/feedback/system_logs/system_logs_fetcher_base.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/feedback/system_logs/system_logs_fetcher_base.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "content/public/browser/browser_thread.h"
 
 using content::BrowserThread;
 
 namespace system_logs {
 
 SystemLogsSource::SystemLogsSource(const std::string& source_name)
     : source_name_(source_name) {
 }
 
 SystemLogsSource::~SystemLogsSource() {
 }
 
 SystemLogsFetcherBase::SystemLogsFetcherBase()
     : response_(new SystemLogsResponse),
       num_pending_requests_(0) {
 }
 
 SystemLogsFetcherBase::~SystemLogsFetcherBase() {}
 
 void SystemLogsFetcherBase::Fetch(const SysLogsFetcherCallback& callback) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
   DCHECK(callback_.is_null());
   DCHECK(!callback.is_null());
 
   callback_ = callback;
   for (size_t i = 0; i < data_sources_.size(); ++i) {
     VLOG(1) << "Fetching SystemLogSource: " << data_sources_[i]->source_name();
     data_sources_[i]->Fetch(base::Bind(&SystemLogsFetcherBase::AddResponse,
                                        AsWeakPtr(),
                                        data_sources_[i]->source_name()));
   }
 }
 
 void SystemLogsFetcherBase::AddResponse(const std::string& source_name,
                                         SystemLogsResponse* response) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   VLOG(1) << "Received SystemLogSource: " << source_name;
 
   for (SystemLogsResponse::const_iterator it = response->begin();
        it != response->end();
        ++it) {
     // It is an error to insert an element with a pre-existing key.
     bool ok = response_->insert(*it).second;
     DCHECK(ok) << "Duplicate key found: " << it->first;
   }
 
   --num_pending_requests_;
   if (num_pending_requests_ > 0)
     return;
 
   callback_.Run(response_.Pass());
   BrowserThread::DeleteSoon(BrowserThread::UI, FROM_HERE, this);
 }
 
 }  // namespace system_logs