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

tracing/tracing/ui/extras/chrome/cc/display_item_debugger.html

Index: tracing/tracing/ui/extras/chrome/cc/display_item_debugger.html
diff --git a/tracing/tracing/ui/extras/chrome/cc/display_item_debugger.html b/tracing/tracing/ui/extras/chrome/cc/display_item_debugger.html
index 6af80594cf9939455b05db2d06dcb4deda4eb411..0edd855d8547bf50c48ccff0e92bdfc509540619 100644
--- a/tracing/tracing/ui/extras/chrome/cc/display_item_debugger.html
+++ b/tracing/tracing/ui/extras/chrome/cc/display_item_debugger.html
@@ -261,8 +261,8 @@ tr.exportTo('tr.ui.e.chrome.cc', function() {
     },
 
     scheduleUpdateContents_: function() {
-      if (this.updateContentsPending_)
-        return;
+      if (this.updateContentsPending_) return;
+
       this.updateContentsPending_ = true;
       tr.b.requestAnimationFrameInThisFrameIfPossible(
           this.updateContents_.bind(this)
@@ -279,8 +279,7 @@ tr.exportTo('tr.ui.e.chrome.cc', function() {
       }
 
       // Return if picture hasn't finished rasterizing.
-      if (!this.pictureAsImageData_)
-        return;
+      if (!this.pictureAsImageData_) return;
 
       this.infoBar_.visible = false;
       this.infoBar_.removeAllButtons();
@@ -301,15 +300,16 @@ tr.exportTo('tr.ui.e.chrome.cc', function() {
 
     drawPicture_: function() {
       var size = this.getRasterCanvasSize_();
-      if (size.width !== this.rasterCanvas_.width)
+      if (size.width !== this.rasterCanvas_.width) {
         this.rasterCanvas_.width = size.width;
-      if (size.height !== this.rasterCanvas_.height)
+      }
+      if (size.height !== this.rasterCanvas_.height) {
         this.rasterCanvas_.height = size.height;
+      }
 
       this.rasterCtx_.clearRect(0, 0, size.width, size.height);
 
-      if (!this.picture_ || !this.pictureAsImageData_.imageData)
-        return;
+      if (!this.picture_ || !this.pictureAsImageData_.imageData) return;
 
       var imgCanvas = this.pictureAsImageData_.asCanvas();
       var w = imgCanvas.width;
@@ -345,11 +345,12 @@ tr.exportTo('tr.ui.e.chrome.cc', function() {
       var index = Array.prototype.indexOf.call(
           this.displayItemListView_.children, selected);
       var displayItem = this.displayItemList_.items[index];
-      if (displayItem && displayItem.skp64)
+      if (displayItem && displayItem.skp64) {
         this.picture = new tr.e.cc.Picture(
             displayItem.skp64, this.displayItemList_.layerRect);
-      else
+      } else {
         this.picture = undefined;
+      }
     },
 
     onDisplayItemInfoClick_: function(e) {
@@ -402,8 +403,7 @@ tr.exportTo('tr.ui.e.chrome.cc', function() {
     },
 
     onUpdateZoom_: function(e) {
-      if (!this.isZooming_)
-        return;
+      if (!this.isZooming_) return;
 
       var currentMouseViewPos = this.extractRelativeMousePosition_(e);
 
@@ -433,15 +433,15 @@ tr.exportTo('tr.ui.e.chrome.cc', function() {
     },
 
     saveFile_: function(filename, rawData) {
-      if (!rawData)
-        return;
+      if (!rawData) return;
 
       // Convert this String into an Uint8Array
       var length = rawData.length;
       var arrayBuffer = new ArrayBuffer(length);
       var uint8Array = new Uint8Array(arrayBuffer);
-      for (var c = 0; c < length; c++)
+      for (var c = 0; c < length; c++) {
         uint8Array[c] = rawData.charCodeAt(c);
+      }
 
       // Create a blob URL from the binary array.
       var blob = new Blob([uint8Array], {type: 'application/octet-binary'});