Fixed minor formatting in ash/shelf/shelf_view.cc:RecordIconActivatedAction(...)

BUG=471354

Review URL: https://codereview.chromium.org/1061283004

Cr-Commit-Position: refs/heads/master@{#324134}

ash/shelf/shelf_view.cc

@@ -310,12 +310,13 @@ void ReflectItemStatus(const ShelfItem& item, ShelfButton* button) {
 }
 
 void RecordIconActivatedAction(const ui::Event& event) {
-  if (event.IsMouseEvent())
+  if (event.IsMouseEvent()) {
     Shell::GetInstance()->metrics()->RecordUserMetricsAction(
         UMA_LAUNCHER_BUTTON_PRESSED_WITH_MOUSE);
-  else if (event.IsGestureEvent())
+  } else if (event.IsGestureEvent()) {
     Shell::GetInstance()->metrics()->RecordUserMetricsAction(
         UMA_LAUNCHER_BUTTON_PRESSED_WITH_TOUCH);
+  }
 }
 
 }  // namespace