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

tracing/tracing/ui/extras/about_tracing/record_selection_dialog.html

Index: tracing/tracing/ui/extras/about_tracing/record_selection_dialog.html
diff --git a/tracing/tracing/ui/extras/about_tracing/record_selection_dialog.html b/tracing/tracing/ui/extras/about_tracing/record_selection_dialog.html
index d5c3c99b09c7dfcec79fc1925048be15b81d1e57..38f6035415013369012fe83343efe1c17aa6b116 100644
--- a/tracing/tracing/ui/extras/about_tracing/record_selection_dialog.html
+++ b/tracing/tracing/ui/extras/about_tracing/record_selection_dialog.html
@@ -334,15 +334,17 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
     },
 
     set categories(c) {
-      if (!(c instanceof Array))
+      if (!(c instanceof Array)) {
         throw new Error('categories must be an array');
+      }
       this.categories_ = c;
 
       for (var i = 0; i < this.categories_.length; i++) {
         var split = this.categories_[i].split(',');
         this.categories_[i] = split.shift();
-        if (split.length > 0)
+        if (split.length > 0) {
           this.categories_ = this.categories_.concat(split);
+        }
       }
     },
 
@@ -363,9 +365,10 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
     },
 
     set currentlyChosenPreset(preset) {
-      if (!(preset instanceof Array))
+      if (!(preset instanceof Array)) {
         throw new Error('RecordSelectionDialog.currentlyChosenPreset:' +
             ' preset must be an array.');
+      }
       this.currentlyChosenPreset_ = preset;
 
       if (this.usingPreset_()) {
@@ -383,10 +386,11 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
       if (!this.usingPreset_()) {
         classList.remove('categories-column-view-hidden');
       } else {
-        if (this.editCategoriesOpened_)
+        if (this.editCategoriesOpened_) {
           classList.remove('categories-column-view-hidden');
-        else
+        } else {
           classList.add('categories-column-view-hidden');
+        }
       }
     },
 
@@ -404,16 +408,14 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
     },
 
     onClickEditCategories: function() {
-      if (!this.usingPreset_())
-        return;
+      if (!this.usingPreset_()) return;
 
       if (!this.editCategoriesOpened_) {
         this.updateCategoryColumnView_(false);
         for (var i = 0; i < this.currentlyChosenPreset_.length; ++i) {
           var categoryEl = this.querySelector('#' +
               this.currentlyChosenPreset_[i]);
-          if (!categoryEl)
-            continue;
+          if (!categoryEl) continue;
           categoryEl.checked = true;
         }
       }
@@ -426,15 +428,15 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
     changeEditCategoriesState_: function(editCategoriesState) {
       var presetOptionsGroup = Polymer.dom(this).querySelector(
           '.labeled-option-group');
-      if (!presetOptionsGroup)
-        return;
+      if (!presetOptionsGroup) return;
 
       this.editCategoriesOpened_ = editCategoriesState;
-      if (this.editCategoriesOpened_)
+      if (this.editCategoriesOpened_) {
         Polymer.dom(presetOptionsGroup).classList.add('categories-expanded');
-      else
-          Polymer.dom(presetOptionsGroup).classList.remove(
-              'categories-expanded');
+      } else {
+        Polymer.dom(presetOptionsGroup).classList.remove(
+            'categories-expanded');
+      }
     },
 
     updatePresetDescription_: function() {
@@ -447,8 +449,9 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
       } else {
         description.innerText = '';
         if (!Polymer.dom(description).classList.contains(
-            'category-description-hidden'))
+            'category-description-hidden')) {
           Polymer.dom(description).classList.add('category-description-hidden');
+        }
       }
     },
 
@@ -459,11 +462,13 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
         for (var category in allCategories) {
           var disabled = category.indexOf('disabled-by-default-') === 0;
           if (this.currentlyChosenPreset_.indexOf(category) >= 0) {
-            if (disabled)
+            if (disabled) {
               categories.push(category);
+            }
           } else {
-            if (!disabled)
+            if (!disabled) {
               categories.push('-' + category);
+            }
           }
         }
         return categories.join(',');
@@ -476,8 +481,7 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
         // Skip any category with a , as it will cause issues when we negate.
         // Both sides should have been added as separate categories, these can
         // only come from settings.
-        if (categories[i].match(/,/))
-          continue;
+        if (categories[i].match(/,/)) continue;
         negatedCategories.push('-' + categories[i]);
       }
       categories = negatedCategories.join(',');
@@ -486,10 +490,12 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
       disabledCategories = disabledCategories.join(',');
 
       var results = [];
-      if (categories !== '')
+      if (categories !== '') {
         results.push(categories);
-      if (disabledCategories !== '')
+      }
+      if (disabledCategories !== '') {
         results.push(disabledCategories);
+      }
       return results.join(',');
     },
 
@@ -508,8 +514,9 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
       var categories = [];
       for (var i = 0; i < inputsLength; ++i) {
         var input = inputs[i];
-        if (input.checked === isChecked)
+        if (input.checked === isChecked) {
           categories.push(input.value);
+        }
       }
       return categories;
     },
@@ -529,8 +536,9 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
     },
 
     onVisibleChange_: function() {
-      if (this.visible)
+      if (this.visible) {
         this.updateForm_();
+      }
     },
 
     buildInputs_: function(inputs, checkedDefault, parent) {
@@ -567,8 +575,9 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
       var allCategories =
           this.categories_.concat(tr.b.Settings.keys(this.settings_key_));
       var allCategoriesLength = allCategories.length;
-      for (var i = 0; i < allCategoriesLength; ++i)
+      for (var i = 0; i < allCategoriesLength; ++i) {
         categorySet[allCategories[i]] = true;
+      }
       return categorySet;
     },
 
@@ -587,10 +596,11 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
       var categories = [];
       var disabledCategories = [];
       for (var category in allCategories) {
-        if (category.indexOf('disabled-by-default-') === 0)
+        if (category.indexOf('disabled-by-default-') === 0) {
           disabledCategories.push(category);
-        else
+        } else {
           categories.push(category);
+        }
       }
       disabledCategories = disabledCategories.sort(ignoreCaseCompare);
       categories = categories.sort(ignoreCaseCompare);
@@ -632,8 +642,7 @@ tr.exportTo('tr.ui.e.about_tracing', function() {
       var flipInputs = function(dir) {
         var inputs = Polymer.dom(parent).querySelectorAll('input');
         for (var i = 0; i < inputs.length; i++) {
-          if (inputs[i].checked === dir)
-            continue;
+          if (inputs[i].checked === dir) continue;
           // click() is used so the settings will be correclty stored. Setting
           // checked does not trigger the onclick (or onchange) callback.
           inputs[i].click();