Replace DCHECK(BrowserThread::CurrentlyOn) with DCHECK_CURRENTLY_ON in extensions.

chrome/browser/extensions/api/downloads/downloads_api_browsertest.cc

 // Copyright (c) 2012 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.
 
 // Disable everything on windows only. http://crbug.com/306144
 #ifndef OS_WIN
 
 #include <algorithm>
 
 #include "base/file_util.h"
@@ skipping 714 matching lines @@
     // Wait for that to finish.
     done_event.Wait();
     base::DeleteFile(temp_file, false);
     return result;
   }
 
  private:
   static void CopyInCompletion(bool* result,
                                base::WaitableEvent* done_event,
                                base::File::Error error) {
-    DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+    DCHECK_CURRENTLY_ON(BrowserThread::IO);
     *result = error == base::File::FILE_OK;
     done_event->Signal();
   }
 
   static void CreateFileForTestingOnIOThread(
       fileapi::FileSystemContext* context,
       const fileapi::FileSystemURL& path,
       const base::FilePath& temp_file,
       bool* result,
       base::WaitableEvent* done_event) {
-    DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+    DCHECK_CURRENTLY_ON(BrowserThread::IO);
     context->operation_runner()->CopyInForeignFile(
         temp_file, path,
         base::Bind(&CopyInCompletion,
                    base::Unretained(result),
                    base::Unretained(done_event)));
   }
 };
 
 // TODO(benjhayden) Merge this with the other TestObservers.
 class JustInProgressDownloadObserver
@@ skipping 2892 matching lines @@
   EXPECT_EQ("suggester", winner_id);
   EXPECT_EQ(FILE_PATH_LITERAL("b"), filename.value());
   EXPECT_EQ(api::FILENAME_CONFLICT_ACTION_PROMPT, conflict_action);
   EXPECT_FALSE(warnings.empty());
   EXPECT_EQ(extensions::ExtensionWarning::kDownloadFilenameConflict,
             warnings.begin()->warning_type());
   EXPECT_EQ("incumbent", warnings.begin()->extension_id());
 }
 
 #endif  // http://crbug.com/3061144