[chrome/browser/chromeos/] favor DCHECK_CURRENTLY_ON for better logs

chrome/browser/chromeos/login/screenshot_testing/screenshot_tester.cc

 // Copyright 2014 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/login/screenshot_testing/screenshot_tester.h"
 
 #include "ash/shell.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "chrome/browser/chromeos/login/screenshot_testing/SkDiffPixelsMetric.h"
@@ skipping 185 matching lines @@
 
 void ScreenshotTester::ReturnScreenshot(const PNGFile& screenshot,
                                         PNGFile png_data) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   screenshot->data() = png_data->data();
   content::BrowserThread::PostTask(
       content::BrowserThread::UI, FROM_HERE, run_loop_quitter_);
 }
 
 ScreenshotTester::PNGFile ScreenshotTester::TakeScreenshot() {
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   aura::Window* primary_window = ash::Shell::GetPrimaryRootWindow();
   gfx::Rect rect = primary_window->bounds();
   PNGFile screenshot = new base::RefCountedBytes;
   ui::GrabWindowSnapshotAsync(primary_window,
                               rect,
                               content::BrowserThread::GetBlockingPool(),
                               base::Bind(&ScreenshotTester::ReturnScreenshot,
                                          weak_factory_.GetWeakPtr(),
                                          screenshot));
   base::RunLoop run_loop;
@@ skipping 126 matching lines @@
 
   ScreenshotTester::Result testing_result;
   testing_result.similarity = result.result;
   testing_result.screenshots_match =
       (result.result == SkImageDiffer::RESULT_CORRECT);
 
   return testing_result;
 }
 
 }  // namespace chromeos