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

tracing/tracing/model/time_to_object_instance_map.html

Index: tracing/tracing/model/time_to_object_instance_map.html
diff --git a/tracing/tracing/model/time_to_object_instance_map.html b/tracing/tracing/model/time_to_object_instance_map.html
index d8f15884f48493ebc96b8ab308eddf98d3dab458..6e27d93dc14f811af6335873f06877efba179f02 100644
--- a/tracing/tracing/model/time_to_object_instance_map.html
+++ b/tracing/tracing/model/time_to_object_instance_map.html
@@ -102,11 +102,11 @@ tr.exportTo('tr.model', function() {
           var lastValidIndex;
           for (var i = this.instances.length - 1; i >= 0; i--) {
             var tmp = this.instances[i];
-            if (ts >= tmp.deletionTs)
-              break;
+            if (ts >= tmp.deletionTs) break;
             if (tmp.creationTsWasExplicit === false &&
-                tmp.snapshots.length === 0)
+                tmp.snapshots.length === 0) {
               lastValidIndex = i;
+            }
           }
           if (lastValidIndex === undefined) {
             throw new Error(
@@ -123,8 +123,7 @@ tr.exportTo('tr.model', function() {
     },
 
     get lastInstance() {
-      if (this.instances.length === 0)
-        return undefined;
+      if (this.instances.length === 0) return undefined;
       return this.instances[this.instances.length - 1];
     },
 
@@ -134,15 +133,17 @@ tr.exportTo('tr.model', function() {
             this.parent, this.scopedId, category, name, ts));
       }
       var lastInstance = this.instances[this.instances.length - 1];
-      if (ts < lastInstance.creationTs)
+      if (ts < lastInstance.creationTs) {
         throw new Error('Cannot delete an id before it was created');
+      }
       if (lastInstance.deletionTs === Number.MAX_VALUE) {
         lastInstance.wasDeleted(ts);
         return lastInstance;
       }
 
-      if (ts < lastInstance.deletionTs)
+      if (ts < lastInstance.deletionTs) {
         throw new Error('id was already deleted earlier.');
+      }
 
       // A new instance was deleted with no snapshots in-between.
       // Create an instance then kill it.
@@ -160,8 +161,9 @@ tr.exportTo('tr.model', function() {
           function(inst) { return inst.deletionTs - inst.creationTs; },
           ts);
       if (i < 0) {
-        if (this.instances[0].creationTsWasExplicit)
+        if (this.instances[0].creationTsWasExplicit) {
           return undefined;
+        }
         return this.instances[0];
       } else if (i >= this.instances.length) {
         return undefined;