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

chrome/browser/thumbnails/content_based_thumbnailing_algorithm.cc

 // Copyright 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/content_based_thumbnailing_algorithm.h"
 
 #include "base/metrics/histogram.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/thumbnails/content_analysis.h"
 #include "chrome/browser/thumbnails/simple_thumbnail_crop.h"
@@ skipping 42 matching lines @@
   ClipResult clipping_method = thumbnails::CLIP_RESULT_NOT_CLIPPED;
   *clipping_rect = GetClippingRect(source_size, copy_thumbnail_size, copy_size,
                                    &clipping_method);
   return clipping_method;
 }
 
 void ContentBasedThumbnailingAlgorithm::ProcessBitmap(
     scoped_refptr<ThumbnailingContext> context,
     const ConsumerCallback& callback,
     const SkBitmap& bitmap) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
   DCHECK(context.get());
   if (bitmap.isNull() || bitmap.empty())
     return;
 
   gfx::Size target_thumbnail_size =
       SimpleThumbnailCrop::ComputeTargetSizeAtMaximumScale(target_size_);
 
   SkBitmap source_bitmap =
       PrepareSourceBitmap(bitmap, target_thumbnail_size, context.get());
 
@@ skipping 159 matching lines @@
   } else {
     clipping_rect = gfx::Rect(source_size);
     target_size->SetSize(source_size.width() / 2, source_size.height() / 2);
     *clip_result = CLIP_RESULT_NOT_CLIPPED;
   }
 
   return clipping_rect;
 }
 
 }  // namespace thumbnails