[ESLint] Fix violations when enabling curly rule in eslint.

tracing/tracing/ui/find_control.html

Index: tracing/tracing/ui/find_control.html
diff --git a/tracing/tracing/ui/find_control.html b/tracing/tracing/ui/find_control.html
index 7cbdd79be109605da6c19c558016cd27f5ae70d2..7a499237f6389cf796c51d58c4abdd925a5c9422 100644
--- a/tracing/tracing/ui/find_control.html
+++ b/tracing/tracing/ui/find_control.html
@@ -95,10 +95,11 @@ Polymer({
       e.stopPropagation();
       return;
     } else if (e.keyCode === 13) {
-      if (e.shiftKey)
+      if (e.shiftKey) {
         this.findPrevious();
-      else
+      } else {
         this.findNext();
+      }
     }
   },
 
@@ -145,14 +146,16 @@ Polymer({
   },
 
   findNext: function() {
-    if (this.controller)
+    if (this.controller) {
       this.controller.findNext();
+    }
     this.updateHitCountEl();
   },
 
   findPrevious: function() {
-    if (this.controller)
+    if (this.controller) {
       this.controller.findPrevious();
+    }
     this.updateHitCountEl();
   },