Add LOCAL_ prefix to non-UMA histogram macros.

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 161 matching lines @@
     ClipResult clip_result;
     gfx::Rect clipping_rect = SimpleThumbnailCrop::GetClippingRect(
         gfx::Size(source_bitmap.width(), source_bitmap.height()),
         thumbnail_size,
         &clip_result);
     source_bitmap.extractSubset(&thumbnail, gfx::RectToSkIRect(clipping_rect));
     thumbnail = SkBitmapOperations::DownsampleByTwoUntilSize(
         thumbnail, thumbnail_size.width(), thumbnail_size.height());
   }
 
-  HISTOGRAM_TIMES(
-      processing_failed ? kFailureHistogramName : kThumbnailHistogramName,
-      base::TimeTicks::Now() - begin_compute_thumbnail);
+  if (processing_failed) {
+    LOCAL_HISTOGRAM_TIMES(kFailureHistogramName,
+                          base::TimeTicks::Now() - begin_compute_thumbnail);
+  } else {
+    LOCAL_HISTOGRAM_TIMES(kThumbnailHistogramName,
+                          base::TimeTicks::Now() - begin_compute_thumbnail);
+  }
   context->score.boring_score =
         SimpleThumbnailCrop::CalculateBoringScore(source_bitmap);
   if (!processing_failed)
     context->score.boring_score *= kScoreBoostFromSuccessfulRetargeting;
   context->score.good_clipping =
       (context->clip_result == CLIP_RESULT_WIDER_THAN_TALL ||
        context->clip_result == CLIP_RESULT_TALLER_THAN_WIDE ||
        context->clip_result == CLIP_RESULT_NOT_CLIPPED ||
        context->clip_result == CLIP_RESULT_SOURCE_SAME_AS_TARGET);
   // Post the result (the bitmap) back to the callback.
@@ skipping 33 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