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

tracing/tracing/model/ir_coverage.html

Index: tracing/tracing/model/ir_coverage.html
diff --git a/tracing/tracing/model/ir_coverage.html b/tracing/tracing/model/ir_coverage.html
index ff42f28abf3aa987a083e28ae52f84396a588939..b173db1547ca7df223c6ac10aa3e5035b9d22b2e 100644
--- a/tracing/tracing/model/ir_coverage.html
+++ b/tracing/tracing/model/ir_coverage.html
@@ -18,8 +18,7 @@ tr.exportTo('tr.model', function() {
       ir.associatedEvents.forEach(function(event) {
         // FlowEvents don't have parentContainers or cpuDurations, and it's
         // annoying to highlight them.
-        if (event instanceof tr.model.FlowEvent)
-          return;
+        if (event instanceof tr.model.FlowEvent) return;
         allAssociatedEvents.push(event);
       });
     });
@@ -32,11 +31,15 @@ tr.exportTo('tr.model', function() {
     // the set of associated events.
     // Only add event to the set of unassociated events if it is not in
     // the set of associated events.
-    for (var proc of model.getAllProcesses())
-      for (var thread of tr.b.dictionaryValues(proc.threads))
-        for (var event of thread.sliceGroup.getDescendantEvents())
-          if (!associatedEvents.contains(event))
+    for (var proc of model.getAllProcesses()) {
+      for (var thread of tr.b.dictionaryValues(proc.threads)) {
+        for (var event of thread.sliceGroup.getDescendantEvents()) {
+          if (!associatedEvents.contains(event)) {
             unassociatedEvents.push(event);
+          }
+        }
+      }
+    }
     return unassociatedEvents;
   }
 
@@ -44,8 +47,9 @@ tr.exportTo('tr.model', function() {
     var cpuMs = 0;
     events.forEach(function(event) {
       // Add up events' cpu self time if they have any.
-      if (event.cpuSelfTime)
+      if (event.cpuSelfTime) {
         cpuMs += event.cpuSelfTime;
+      }
     });
     return cpuMs;
   }
@@ -53,8 +57,7 @@ tr.exportTo('tr.model', function() {
   function getIRCoverageFromModel(model) {
     var associatedEvents = getAssociatedEvents(model.userModel.expectations);
 
-    if (!associatedEvents.length)
-      return undefined;
+    if (!associatedEvents.length) return undefined;
 
     var unassociatedEvents = getUnassociatedEvents(
         model, associatedEvents);
@@ -65,8 +68,9 @@ tr.exportTo('tr.model', function() {
     var totalEventCount = associatedEvents.length + unassociatedEvents.length;
     var totalCpuMs = associatedCpuMs + unassociatedCpuMs;
     var coveredEventsCpuTimeRatio = undefined;
-    if (totalCpuMs !== 0)
+    if (totalCpuMs !== 0) {
       coveredEventsCpuTimeRatio = associatedCpuMs / totalCpuMs;
+    }
 
     return {
       associatedEventsCount: associatedEvents.length,