Clean up JavaScript files to better follow coding standard.

src/messages.js

Index: src/messages.js
diff --git a/src/messages.js b/src/messages.js
index 2df734cecc19634bff62c6b00428efcc0e5230ea..4e9163c94b09e5eb371eb8cd2b0b2cff847edc4b 100644
--- a/src/messages.js
+++ b/src/messages.js
@@ -957,8 +957,9 @@ function FormatSourcePosition(frame) {
     fileLocation = "native";
   } else if (frame.isEval()) {
     fileName = frame.getScriptNameOrSourceURL();
-    if (!fileName)
+    if (!fileName) {
       fileLocation = frame.getEvalOrigin();
+    }
   } else {
     fileName = frame.getFileName();
   }