Clean up JavaScript files to better follow coding standard.

src/debug-debugger.js

Index: src/debug-debugger.js
diff --git a/src/debug-debugger.js b/src/debug-debugger.js
index d254ee56965c0e40da77086b172cdba55b3f3a65..7586353a2ea4b2a022af2cee92e39f91d3828f61 100644
--- a/src/debug-debugger.js
+++ b/src/debug-debugger.js
@@ -677,8 +677,9 @@ Debug.setBreakPointByScriptIdAndPosition = function(script_id, position,
 {
   break_point = MakeBreakPoint(position);
   break_point.setCondition(condition);
-  if (!enabled)
+  if (!enabled) {
     break_point.disable();
+  }
   var scripts = this.scripts();
   for (var i = 0; i < scripts.length; i++) {
     if (script_id == scripts[i].id) {
@@ -960,8 +961,9 @@ ExecutionState.prototype.threadCount = function() {
 ExecutionState.prototype.frame = function(opt_index) {
   // If no index supplied return the selected frame.
   if (opt_index == null) opt_index = this.selected_frame;
-  if (opt_index < 0 || opt_index >= this.frameCount())
+  if (opt_index < 0 || opt_index >= this.frameCount()) {
     throw new Error('Illegal frame index.');
+  }
   return new FrameMirror(this.break_id, opt_index);
 };