[chrome/browser/t*] favor DCHECK_CURRENTLY_ON for better logs

chrome/browser/thumbnails/simple_thumbnail_crop.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/thumbnails/simple_thumbnail_crop.h"
 
 #include "base/metrics/histogram.h"
 #include "content/public/browser/browser_thread.h"
 #include "skia/ext/platform_canvas.h"
 #include "ui/base/layout.h"
@@ skipping 23 matching lines @@
   ClipResult clip_result = thumbnails::CLIP_RESULT_NOT_CLIPPED;
   *clipping_rect = GetClippingRect(source_size, target_size_, &clip_result);
   *copy_size = GetCopySizeForThumbnail(scale_factor, target_size_);
   return clip_result;
 }
 
 void SimpleThumbnailCrop::ProcessBitmap(
     scoped_refptr<ThumbnailingContext> context,
     const ConsumerCallback& callback,
     const SkBitmap& bitmap) {
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   if (bitmap.isNull() || bitmap.empty())
     return;
 
   SkBitmap thumbnail = CreateThumbnail(
       bitmap,
       ComputeTargetSizeAtMaximumScale(target_size_),
       &context->clip_result);
 
   context->score.boring_score = color_utils::CalculateBoringScore(thumbnail);
   context->score.good_clipping =
@@ skipping 139 matching lines @@
       clipped_bitmap.height() == result.height())
     clipped_bitmap.copyTo(&result, kN32_SkColorType);
 #endif
 
   LOCAL_HISTOGRAM_TIMES(kThumbnailHistogramName,
                         base::TimeTicks::Now() - begin_compute_thumbnail);
   return result;
 }
 
 } // namespace thumbnails