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

tracing/tracing/base/math/running_statistics.html

Index: tracing/tracing/base/math/running_statistics.html
diff --git a/tracing/tracing/base/math/running_statistics.html b/tracing/tracing/base/math/running_statistics.html
index 6fa614aa4b4508597a89f0489a0b7e5dd3496584..bf2103f59696c6965f4acfb045eca5dde41eb075 100644
--- a/tracing/tracing/base/math/running_statistics.html
+++ b/tracing/tracing/base/math/running_statistics.html
@@ -38,14 +38,12 @@ tr.exportTo('tr.b.math', function() {
     }
 
     get geometricMean() {
-      if (this.meanlogs_ === undefined)
-        return 0;
+      if (this.meanlogs_ === undefined) return 0;
       return Math.exp(this.meanlogs_);
     }
 
     get mean() {
-      if (this.count_ === 0)
-        return undefined;
+      if (this.count_ === 0) return undefined;
       return this.mean_;
     }
 
@@ -62,16 +60,13 @@ tr.exportTo('tr.b.math', function() {
     }
 
     get variance() {
-      if (this.count_ === 0)
-        return undefined;
-      if (this.count_ === 1)
-        return 0;
+      if (this.count_ === 0) return undefined;
+      if (this.count_ === 1) return 0;
       return this.variance_ / (this.count_ - 1);
     }
 
     get stddev() {
-      if (this.count_ === 0)
-        return undefined;
+      if (this.count_ === 0) return undefined;
       return Math.sqrt(this.variance);
     }
 
@@ -82,10 +77,11 @@ tr.exportTo('tr.b.math', function() {
       this.sum_ += x;
 
       // The geometric mean is computed using the arithmetic mean of logarithms.
-      if (x <= 0)
+      if (x <= 0) {
         this.meanlogs_ = undefined;
-      else if (this.meanlogs_ !== undefined)
+      } else if (this.meanlogs_ !== undefined) {
         this.meanlogs_ += (Math.log(Math.abs(x)) - this.meanlogs_) / this.count;
+      }
 
       // The following uses Welford's algorithm for computing running mean
       // and variance. See http://www.johndcook.com/blog/standard_deviation.