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

chrome/browser/feedback/system_logs/log_sources/memory_details_log_source.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/log_sources/memory_details_log_source.h"
 
 #include "chrome/browser/memory_details.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace system_logs {
 
 // Reads Chrome memory usage.
 class SystemLogsMemoryHandler : public MemoryDetails {
  public:
   explicit SystemLogsMemoryHandler(const SysLogsSourceCallback& callback)
       : callback_(callback) {}
 
   // Sends the data to the callback.
   // MemoryDetails override.
   void OnDetailsAvailable() override {
-    DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+    DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
     scoped_ptr<SystemLogsResponse> response(new SystemLogsResponse);
     (*response)["mem_usage"] = ToLogString();
     callback_.Run(response.get());
   }
 
  private:
   ~SystemLogsMemoryHandler() override {}
   SysLogsSourceCallback callback_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemLogsMemoryHandler);
 };
 
 MemoryDetailsLogSource::MemoryDetailsLogSource()
     : SystemLogsSource("MemoryDetails") {
 }
 
 MemoryDetailsLogSource::~MemoryDetailsLogSource() {
 }
 
 void MemoryDetailsLogSource::Fetch(const SysLogsSourceCallback& callback) {
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   DCHECK(!callback.is_null());
 
   scoped_refptr<SystemLogsMemoryHandler>
       handler(new SystemLogsMemoryHandler(callback));
   handler->StartFetch(MemoryDetails::FROM_CHROME_ONLY);
 }
 
 }  // namespace system_logs