Fix typos in field trial for low memory experiment.

chrome/browser/ui/views/sad_tab_view.cc

Index: chrome/browser/ui/views/sad_tab_view.cc
diff --git a/chrome/browser/ui/views/sad_tab_view.cc b/chrome/browser/ui/views/sad_tab_view.cc
index 0da6523eaffec71c029ed55bff2b0e7dc4e23eaa..860661a5d01d894adb11aad7b2a6322cb331aa28 100644
--- a/chrome/browser/ui/views/sad_tab_view.cc
+++ b/chrome/browser/ui/views/sad_tab_view.cc
@@ -53,11 +53,13 @@ const int kMessageFontSizeDelta = 1;
 const char kExperiment[] = "LowMemoryMargin";
 
 #define EXPERIMENT_CUSTOM_COUNTS(name, sample, min, max, buckets)          \
+  {                                                                        \
     UMA_HISTOGRAM_CUSTOM_COUNTS(name, sample, min, max, buckets);          \
     if (base::FieldTrialList::TrialExists(kExperiment))                    \
       UMA_HISTOGRAM_CUSTOM_COUNTS(                                         \
           base::FieldTrial::MakeName(name, kExperiment),                   \
-          sample, min, max, buckets);
+          sample, min, max, buckets);                                      \
+  }
 
 }  // namespace