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

tracing/tracing/base/math/math.html

Index: tracing/tracing/base/math/math.html
diff --git a/tracing/tracing/base/math/math.html b/tracing/tracing/base/math/math.html
index e0658a4160bfecadbc1e49334f3c48f43c4a55a7..85e6547a18cb2de20ff1be01167bed44668e511a 100644
--- a/tracing/tracing/base/math/math.html
+++ b/tracing/tracing/base/math/math.html
@@ -35,8 +35,7 @@ tr.exportTo('tr.b.math', function() {
 
   /* Returns true when x and y are within delta of each other. */
   function approximately(x, y, delta) {
-    if (delta === undefined)
-      delta = 1e-9;
+    if (delta === undefined) delta = 1e-9;
     return Math.abs(x - y) < delta;
   }
 
@@ -95,8 +94,7 @@ tr.exportTo('tr.b.math', function() {
   var tmpMat2d = mat2d.create();
 
   vec2.createFromArray = function(arr) {
-    if (arr.length !== 2)
-      throw new Error('Should be length 2');
+    if (arr.length !== 2) throw new Error('Should be length 2');
     var v = vec2.create();
     vec2.set(v, arr[0], arr[1]);
     return v;
@@ -120,8 +118,7 @@ tr.exportTo('tr.b.math', function() {
   };
 
   vec2.interpolatePiecewiseFunction = function(points, x) {
-    if (x < points[0][0])
-      return points[0][1];
+    if (x < points[0][0]) return points[0][1];
     for (var i = 1; i < points.length; ++i) {
       if (x < points[i][0]) {
         var percent = normalize(x, points[i - 1][0], points[i][0]);