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

tracing/tracing/model/kernel.html

Index: tracing/tracing/model/kernel.html
diff --git a/tracing/tracing/model/kernel.html b/tracing/tracing/model/kernel.html
index 58df303201cf00f409a69a790ecb8f191458fcae..b04658146d94864b090ce67cf8600a2ff619cb7f 100644
--- a/tracing/tracing/model/kernel.html
+++ b/tracing/tracing/model/kernel.html
@@ -61,8 +61,9 @@ tr.exportTo('tr.model', function() {
      * it does not exist.
      */
     getOrCreateCpu: function(cpuNumber) {
-      if (!this.cpus[cpuNumber])
+      if (!this.cpus[cpuNumber]) {
         this.cpus[cpuNumber] = new Cpu(this, cpuNumber);
+      }
       return this.cpus[cpuNumber];
     },
 
@@ -89,8 +90,9 @@ tr.exportTo('tr.model', function() {
      */
     get bestGuessAtCpuCount() {
       var realCpuCount = tr.b.dictionaryLength(this.cpus);
-      if (realCpuCount !== 0)
+      if (realCpuCount !== 0) {
         return realCpuCount;
+      }
       return this.softwareMeasuredCpuCount;
     },
 
@@ -113,8 +115,9 @@ tr.exportTo('tr.model', function() {
 
     addCategoriesToDict: function(categoriesDict) {
       ProcessBase.prototype.addCategoriesToDict.call(this, categoriesDict);
-      for (var cpuNumber in this.cpus)
+      for (var cpuNumber in this.cpus) {
         this.cpus[cpuNumber].addCategoriesToDict(categoriesDict);
+      }
     },
 
     getSettingsKey: function() {