Add LOCAL_ prefix to non-UMA histogram macros.

chrome/browser/thumbnails/content_based_thumbnailing_algorithm.cc

Index: chrome/browser/thumbnails/content_based_thumbnailing_algorithm.cc
diff --git a/chrome/browser/thumbnails/content_based_thumbnailing_algorithm.cc b/chrome/browser/thumbnails/content_based_thumbnailing_algorithm.cc
index c4faa32144032be71071bda0c2ae9a50d7e6d20d..9d8b42b4b9a33a3c63892186a3093ae30a56d330 100644
--- a/chrome/browser/thumbnails/content_based_thumbnailing_algorithm.cc
+++ b/chrome/browser/thumbnails/content_based_thumbnailing_algorithm.cc
@@ -179,9 +179,13 @@ void ContentBasedThumbnailingAlgorithm::CreateRetargetedThumbnail(
         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)