favor DCHECK_CURRENTLY_ON for better logs in content/browser/[f-p]*

content/browser/fileapi/file_system_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.
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/test/thread_test_helper.h"
 #include "content/browser/web_contents/web_contents_impl.h"
@@ skipping 51 matching lines @@
   }
 
   static void SetTempQuota(int64 bytes, scoped_refptr<QuotaManager> qm) {
     if (!BrowserThread::CurrentlyOn(BrowserThread::IO)) {
       BrowserThread::PostTask(
           BrowserThread::IO, FROM_HERE,
           base::Bind(&FileSystemBrowserTestWithLowQuota::SetTempQuota, bytes,
                      qm));
       return;
     }
-    DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+    DCHECK_CURRENTLY_ON(BrowserThread::IO);
     qm->SetTemporaryGlobalOverrideQuota(bytes, storage::QuotaCallback());
     // Don't return until the quota has been set.
     scoped_refptr<base::ThreadTestHelper> helper(new base::ThreadTestHelper(
         BrowserThread::GetMessageLoopProxyForThread(BrowserThread::DB).get()));
     ASSERT_TRUE(helper->Run());
   }
 };
 
 IN_PROC_BROWSER_TEST_F(FileSystemBrowserTest, RequestTest) {
   SimpleTest(GetTestUrl("fileapi", "request_test.html"));
 }
 
 IN_PROC_BROWSER_TEST_F(FileSystemBrowserTest, CreateTest) {
   SimpleTest(GetTestUrl("fileapi", "create_test.html"));
 }
 
 IN_PROC_BROWSER_TEST_F(FileSystemBrowserTestWithLowQuota, QuotaTest) {
   SimpleTest(GetTestUrl("fileapi", "quota_test.html"));
 }
 
 }  // namespace content