Clean up JavaScript files to better follow coding standard.

src/mirror-debugger.js

Index: src/mirror-debugger.js
diff --git a/src/mirror-debugger.js b/src/mirror-debugger.js
index 999252d57f5f4f604497ff3992ec8259a95392f3..356c8bc68014117e9ec9a13170d8407028389f85 100644
--- a/src/mirror-debugger.js
+++ b/src/mirror-debugger.js
@@ -1699,7 +1699,7 @@ FrameMirror.prototype.sourceAndPositionText = function() {
 FrameMirror.prototype.localsText = function() {
   // Format local variables.
   var result = '';
-  var locals_count = this.localCount()
+  var locals_count = this.localCount();
   if (locals_count > 0) {
     for (var i = 0; i < locals_count; ++i) {
       result += '      var ';
@@ -2139,7 +2139,7 @@ JSONProtocolSerializer.prototype.serialize_ = function(mirror, reference,
       break;
 
     case PROPERTY_TYPE:
-      throw new Error('PropertyMirror cannot be serialized independeltly')
+      throw new Error('PropertyMirror cannot be serialized independeltly');
       break;
 
     case FRAME_TYPE:
@@ -2179,7 +2179,7 @@ JSONProtocolSerializer.prototype.serialize_ = function(mirror, reference,
           mirror.evalFromScript()) {
         content.evalFromScript =
             this.serializeReference(mirror.evalFromScript());
-        var evalFromLocation = mirror.evalFromLocation()
+        var evalFromLocation = mirror.evalFromLocation();
         if (evalFromLocation) {
           content.evalFromLocation = { line: evalFromLocation.line,
                                        column: evalFromLocation.column };
@@ -2362,7 +2362,7 @@ JSONProtocolSerializer.prototype.serializeFrame_ = function(mirror, content) {
   var x = new Array(mirror.argumentCount());
   for (var i = 0; i < mirror.argumentCount(); i++) {
     var arg = {};
-    var argument_name = mirror.argumentName(i)
+    var argument_name = mirror.argumentName(i);
     if (argument_name) {
       arg.name = argument_name;
     }