favor DCHECK_CURRENTLY_ON for better logs in chrome/browser/chromeos/

chrome/browser/chromeos/drive/search_metadata.cc

 // Copyright (c) 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/chromeos/drive/search_metadata.h"
 
 #include <algorithm>
 #include <queue>
 
 #include "base/bind.h"
@@ skipping 247 matching lines @@
 
 }  // namespace
 
 void SearchMetadata(
     scoped_refptr<base::SequencedTaskRunner> blocking_task_runner,
     ResourceMetadata* resource_metadata,
     const std::string& query,
     const SearchMetadataPredicate& predicate,
     size_t at_most_num_matches,
     const SearchMetadataCallback& callback) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
   DCHECK(!callback.is_null());
 
   const base::TimeTicks start_time = base::TimeTicks::Now();
 
   scoped_ptr<MetadataSearchResultVector> results(
       new MetadataSearchResultVector);
   MetadataSearchResultVector* results_ptr = results.get();
   base::PostTaskAndReplyWithResult(
       blocking_task_runner.get(), FROM_HERE,
       base::Bind(&SearchMetadataOnBlockingPool, resource_metadata, query,
@@ skipping 51 matching lines @@
   highlighted_text->append(net::EscapeForHTML(base::UTF16ToUTF8(pre)));
   highlighted_text->append("<b>");
   highlighted_text->append(net::EscapeForHTML(base::UTF16ToUTF8(match)));
   highlighted_text->append("</b>");
   highlighted_text->append(net::EscapeForHTML(base::UTF16ToUTF8(post)));
   return true;
 }
 
 }  // namespace internal
 }  // namespace drive