Remove lazy loading of natives files and the natives cache....

src/mirror-delay.js

-// Copyright 2006-2008 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Touch the RegExp and Date functions to make sure that date-delay.js and
-// regexp-delay.js has been loaded. This is required as the mirrors use
-// functions within these files through the builtins object.
-RegExp;
-Date;
-
-
-// Handle id counters.
-var next_handle_ = 0;
-var next_transient_handle_ = -1;
-
-// Mirror cache.
-var mirror_cache_ = [];
-
-
-/**
- * Clear the mirror handle cache.
- */
-function ClearMirrorCache() {
-  next_handle_ = 0;
-  mirror_cache_ = [];
-}
-
-
-/**
- * Returns the mirror for a specified value or object.
- *
- * @param {value or Object} value the value or object to retreive the mirror for
- * @param {boolean} transient indicate whether this object is transient and
- *    should not be added to the mirror cache. The default is not transient.
- * @returns {Mirror} the mirror reflects the passed value or object
- */
-function MakeMirror(value, opt_transient) {
-  var mirror;
-
-  // Look for non transient mirrors in the mirror cache.
-  if (!opt_transient) {
-    for (id in mirror_cache_) {
-      mirror = mirror_cache_[id];
-      if (mirror.value() === value) {
-        return mirror;
-      }
-      // Special check for NaN as NaN == NaN is false.
-      if (mirror.isNumber() && isNaN(mirror.value()) &&
-          typeof value == 'number' && isNaN(value)) {
-        return mirror;
-      }
-    }
-  }
-  
-  if (IS_UNDEFINED(value)) {
-    mirror = new UndefinedMirror();
-  } else if (IS_NULL(value)) {
-    mirror = new NullMirror();
-  } else if (IS_BOOLEAN(value)) {
-    mirror = new BooleanMirror(value);
-  } else if (IS_NUMBER(value)) {
-    mirror = new NumberMirror(value);
-  } else if (IS_STRING(value)) {
-    mirror = new StringMirror(value);
-  } else if (IS_ARRAY(value)) {
-    mirror = new ArrayMirror(value);
-  } else if (IS_DATE(value)) {
-    mirror = new DateMirror(value);
-  } else if (IS_FUNCTION(value)) {
-    mirror = new FunctionMirror(value);
-  } else if (IS_REGEXP(value)) {
-    mirror = new RegExpMirror(value);
-  } else if (IS_ERROR(value)) {
-    mirror = new ErrorMirror(value);
-  } else if (IS_SCRIPT(value)) {
-    mirror = new ScriptMirror(value);
-  } else {
-    mirror = new ObjectMirror(value, OBJECT_TYPE, opt_transient);
-  }
-
-  mirror_cache_[mirror.handle()] = mirror;
-  return mirror;
-}
-
-
-/**
- * Returns the mirror for a specified mirror handle.
- *
- * @param {number} handle the handle to find the mirror for
- * @returns {Mirror or undefiend} the mirror with the requested handle or
- *     undefined if no mirror with the requested handle was found
- */
-function LookupMirror(handle) {
-  return mirror_cache_[handle];
-}
-
-  
-/**
- * Returns the mirror for the undefined value.
- *
- * @returns {Mirror} the mirror reflects the undefined value
- */
-function GetUndefinedMirror() {
-  return MakeMirror(void 0);
-}
-
-
-/**
- * Inherit the prototype methods from one constructor into another.
- *
- * The Function.prototype.inherits from lang.js rewritten as a standalone
- * function (not on Function.prototype). NOTE: If this file is to be loaded
- * during bootstrapping this function needs to be revritten using some native
- * functions as prototype setup using normal JavaScript does not work as
- * expected during bootstrapping (see mirror.js in r114903).
- *
- * @param {function} ctor Constructor function which needs to inherit the
- *     prototype
- * @param {function} superCtor Constructor function to inherit prototype from
- */
-function inherits(ctor, superCtor) {
-  var tempCtor = function(){};
-  tempCtor.prototype = superCtor.prototype;
-  ctor.super_ = superCtor.prototype;
-  ctor.prototype = new tempCtor();
-  ctor.prototype.constructor = ctor;
-}
-
-
-// Type names of the different mirrors.
-const UNDEFINED_TYPE = 'undefined';
-const NULL_TYPE = 'null';
-const BOOLEAN_TYPE = 'boolean';
-const NUMBER_TYPE = 'number';
-const STRING_TYPE = 'string';
-const OBJECT_TYPE = 'object';
-const FUNCTION_TYPE = 'function';
-const REGEXP_TYPE = 'regexp';
-const ERROR_TYPE = 'error';
-const PROPERTY_TYPE = 'property';
-const FRAME_TYPE = 'frame';
-const SCRIPT_TYPE = 'script';
-const CONTEXT_TYPE = 'context';
-const SCOPE_TYPE = 'scope';
-
-// Maximum length when sending strings through the JSON protocol.
-const kMaxProtocolStringLength = 80;
-
-// Different kind of properties.
-PropertyKind = {};
-PropertyKind.Named   = 1;
-PropertyKind.Indexed = 2;
-
-
-// A copy of the PropertyType enum from global.h
-PropertyType = {};
-PropertyType.Normal             = 0;
-PropertyType.Field              = 1;
-PropertyType.ConstantFunction   = 2;
-PropertyType.Callbacks          = 3;
-PropertyType.Interceptor        = 4;
-PropertyType.MapTransition      = 5;
-PropertyType.ConstantTransition = 6;
-PropertyType.NullDescriptor     = 7;
-
-
-// Different attributes for a property.
-PropertyAttribute = {};
-PropertyAttribute.None       = NONE;
-PropertyAttribute.ReadOnly   = READ_ONLY;
-PropertyAttribute.DontEnum   = DONT_ENUM;
-PropertyAttribute.DontDelete = DONT_DELETE;
-
-
-// A copy of the scope types from runtime.cc.
-ScopeType = { Global: 0,
-              Local: 1,
-              With: 2,
-              Closure: 3,
-              Catch: 4 };
-
-
-// Mirror hierarchy:
-//   - Mirror
-//     - ValueMirror
-//       - UndefinedMirror
-//       - NullMirror
-//       - NumberMirror
-//       - StringMirror
-//       - ObjectMirror
-//         - FunctionMirror
-//           - UnresolvedFunctionMirror
-//         - ArrayMirror
-//         - DateMirror
-//         - RegExpMirror
-//         - ErrorMirror
-//     - PropertyMirror
-//     - FrameMirror
-//     - ScriptMirror
-
-
-/**
- * Base class for all mirror objects.
- * @param {string} type The type of the mirror
- * @constructor
- */
-function Mirror(type) {
-  this.type_ = type;
-};
-
-
-Mirror.prototype.type = function() {
-  return this.type_;
-};
-
-
-/**
- * Check whether the mirror reflects a value.
- * @returns {boolean} True if the mirror reflects a value.
- */
-Mirror.prototype.isValue = function() {
-  return this instanceof ValueMirror;
-}
-
-
-/**
- * Check whether the mirror reflects the undefined value.
- * @returns {boolean} True if the mirror reflects the undefined value.
- */
-Mirror.prototype.isUndefined = function() {
-  return this instanceof UndefinedMirror;
-}
-
-
-/**
- * Check whether the mirror reflects the null value.
- * @returns {boolean} True if the mirror reflects the null value
- */
-Mirror.prototype.isNull = function() {
-  return this instanceof NullMirror;
-}
-
-
-/**
- * Check whether the mirror reflects a boolean value.
- * @returns {boolean} True if the mirror reflects a boolean value
- */
-Mirror.prototype.isBoolean = function() {
-  return this instanceof BooleanMirror;
-}
-
-
-/**
- * Check whether the mirror reflects a number value.
- * @returns {boolean} True if the mirror reflects a number value
- */
-Mirror.prototype.isNumber = function() {
-  return this instanceof NumberMirror;
-}
-
-
-/**
- * Check whether the mirror reflects a string value.
- * @returns {boolean} True if the mirror reflects a string value
- */
-Mirror.prototype.isString = function() {
-  return this instanceof StringMirror;
-}
-
-
-/**
- * Check whether the mirror reflects an object.
- * @returns {boolean} True if the mirror reflects an object
- */
-Mirror.prototype.isObject = function() {
-  return this instanceof ObjectMirror;
-}
-
-
-/**
- * Check whether the mirror reflects a function.
- * @returns {boolean} True if the mirror reflects a function
- */
-Mirror.prototype.isFunction = function() {
-  return this instanceof FunctionMirror;
-}
-
-
-/**
- * Check whether the mirror reflects an unresolved function.
- * @returns {boolean} True if the mirror reflects an unresolved function
- */
-Mirror.prototype.isUnresolvedFunction = function() {
-  return this instanceof UnresolvedFunctionMirror;
-}
-
-
-/**
- * Check whether the mirror reflects an array.
- * @returns {boolean} True if the mirror reflects an array
- */
-Mirror.prototype.isArray = function() {
-  return this instanceof ArrayMirror;
-}
-
-
-/**
- * Check whether the mirror reflects a date.
- * @returns {boolean} True if the mirror reflects a date
- */
-Mirror.prototype.isDate = function() {
-  return this instanceof DateMirror;
-}
-
-
-/**
- * Check whether the mirror reflects a regular expression.
- * @returns {boolean} True if the mirror reflects a regular expression
- */
-Mirror.prototype.isRegExp = function() {
-  return this instanceof RegExpMirror;
-}
-
-
-/**
- * Check whether the mirror reflects an error.
- * @returns {boolean} True if the mirror reflects an error
- */
-Mirror.prototype.isError = function() {
-  return this instanceof ErrorMirror;
-}
-
-
-/**
- * Check whether the mirror reflects a property.
- * @returns {boolean} True if the mirror reflects a property
- */
-Mirror.prototype.isProperty = function() {
-  return this instanceof PropertyMirror;
-}
-
-
-/**
- * Check whether the mirror reflects a stack frame.
- * @returns {boolean} True if the mirror reflects a stack frame
- */
-Mirror.prototype.isFrame = function() {
-  return this instanceof FrameMirror;
-}
-
-
-/**
- * Check whether the mirror reflects a script.
- * @returns {boolean} True if the mirror reflects a script
- */
-Mirror.prototype.isScript = function() {
-  return this instanceof ScriptMirror;
-}
-
-
-/**
- * Check whether the mirror reflects a context.
- * @returns {boolean} True if the mirror reflects a context
- */
-Mirror.prototype.isContext = function() {
-  return this instanceof ContextMirror;
-}
-
-
-/**
- * Check whether the mirror reflects a scope.
- * @returns {boolean} True if the mirror reflects a scope
- */
-Mirror.prototype.isScope = function() {
-  return this instanceof ScopeMirror;
-}
-
-
-/**
- * Allocate a handle id for this object.
- */
-Mirror.prototype.allocateHandle_ = function() {
-  this.handle_ = next_handle_++;
-}
-
-
-/**
- * Allocate a transient handle id for this object. Transient handles are
- * negative.
- */
-Mirror.prototype.allocateTransientHandle_ = function() {
-  this.handle_ = next_transient_handle_--;
-}
-
-
-Mirror.prototype.toText = function() {
-  // Simpel to text which is used when on specialization in subclass.
-  return "#<" + builtins.GetInstanceName(this.constructor.name) + ">";
-}
-
-
-/**
- * Base class for all value mirror objects.
- * @param {string} type The type of the mirror
- * @param {value} value The value reflected by this mirror
- * @param {boolean} transient indicate whether this object is transient with a
- *    transient handle
- * @constructor
- * @extends Mirror
- */
-function ValueMirror(type, value, transient) {
-  Mirror.call(this, type);
-  this.value_ = value;
-  if (!transient) {
-    this.allocateHandle_();
-  } else {
-    this.allocateTransientHandle_();
-  }
-}
-inherits(ValueMirror, Mirror);
-
-
-Mirror.prototype.handle = function() {
-  return this.handle_;
-};
-
-
-/**
- * Check whether this is a primitive value.
- * @return {boolean} True if the mirror reflects a primitive value
- */
-ValueMirror.prototype.isPrimitive = function() {
-  var type = this.type();
-  return type === 'undefined' ||
-         type === 'null' ||
-         type === 'boolean' ||
-         type === 'number' ||
-         type === 'string';
-};
-
-
-/**
- * Get the actual value reflected by this mirror.
- * @return {value} The value reflected by this mirror
- */
-ValueMirror.prototype.value = function() {
-  return this.value_;
-};
-
-
-/**
- * Mirror object for Undefined.
- * @constructor
- * @extends ValueMirror
- */
-function UndefinedMirror() {
-  ValueMirror.call(this, UNDEFINED_TYPE, void 0);
-}
-inherits(UndefinedMirror, ValueMirror);
-
-
-UndefinedMirror.prototype.toText = function() {
-  return 'undefined';
-}
-
-
-/**
- * Mirror object for null.
- * @constructor
- * @extends ValueMirror
- */
-function NullMirror() {
-  ValueMirror.call(this, NULL_TYPE, null);
-}
-inherits(NullMirror, ValueMirror);
-
-
-NullMirror.prototype.toText = function() {
-  return 'null';
-}
-
-
-/**
- * Mirror object for boolean values.
- * @param {boolean} value The boolean value reflected by this mirror
- * @constructor
- * @extends ValueMirror
- */
-function BooleanMirror(value) {
-  ValueMirror.call(this, BOOLEAN_TYPE, value);
-}
-inherits(BooleanMirror, ValueMirror);
-
-
-BooleanMirror.prototype.toText = function() {
-  return this.value_ ? 'true' : 'false';
-}
-
-
-/**
- * Mirror object for number values.
- * @param {number} value The number value reflected by this mirror
- * @constructor
- * @extends ValueMirror
- */
-function NumberMirror(value) {
-  ValueMirror.call(this, NUMBER_TYPE, value);
-}
-inherits(NumberMirror, ValueMirror);
-
-
-NumberMirror.prototype.toText = function() {
-  return %NumberToString(this.value_);
-}
-
-
-/**
- * Mirror object for string values.
- * @param {string} value The string value reflected by this mirror
- * @constructor
- * @extends ValueMirror
- */
-function StringMirror(value) {
-  ValueMirror.call(this, STRING_TYPE, value);
-}
-inherits(StringMirror, ValueMirror);
-
-
-StringMirror.prototype.length = function() {
-  return this.value_.length;
-};
-
-
-StringMirror.prototype.toText = function() {
-  if (this.length() > kMaxProtocolStringLength) {
-    return this.value_.substring(0, kMaxProtocolStringLength) +
-           '... (length: ' + this.length() + ')';
-  } else {
-    return this.value_;
-  }
-}
-
-
-/**
- * Mirror object for objects.
- * @param {object} value The object reflected by this mirror
- * @param {boolean} transient indicate whether this object is transient with a
- *    transient handle
- * @constructor
- * @extends ValueMirror
- */
-function ObjectMirror(value, type, transient) {
-  ValueMirror.call(this, type || OBJECT_TYPE, value, transient);
-}
-inherits(ObjectMirror, ValueMirror);
-
-
-ObjectMirror.prototype.className = function() {
-  return %_ClassOf(this.value_);
-};
-
-
-ObjectMirror.prototype.constructorFunction = function() {
-  return MakeMirror(%DebugGetProperty(this.value_, 'constructor'));
-};
-
-
-ObjectMirror.prototype.prototypeObject = function() {
-  return MakeMirror(%DebugGetProperty(this.value_, 'prototype'));
-};
-
-
-ObjectMirror.prototype.protoObject = function() {
-  return MakeMirror(%DebugGetPrototype(this.value_));
-};
-
-
-ObjectMirror.prototype.hasNamedInterceptor = function() {
-  // Get information on interceptors for this object.
-  var x = %GetInterceptorInfo(this.value_);
-  return (x & 2) != 0;
-};
-
-
-ObjectMirror.prototype.hasIndexedInterceptor = function() {
-  // Get information on interceptors for this object.
-  var x = %GetInterceptorInfo(this.value_);
-  return (x & 1) != 0;
-};
-
-
-/**
- * Return the property names for this object.
- * @param {number} kind Indicate whether named, indexed or both kinds of
- *     properties are requested
- * @param {number} limit Limit the number of names returend to the specified
-       value
- * @return {Array} Property names for this object
- */
-ObjectMirror.prototype.propertyNames = function(kind, limit) {
-  // Find kind and limit and allocate array for the result
-  kind = kind || PropertyKind.Named | PropertyKind.Indexed;
-
-  var propertyNames;
-  var elementNames;
-  var total = 0;
-  
-  // Find all the named properties.
-  if (kind & PropertyKind.Named) {
-    // Get the local property names.
-    propertyNames = %GetLocalPropertyNames(this.value_);
-    total += propertyNames.length;
-
-    // Get names for named interceptor properties if any.
-    if (this.hasNamedInterceptor() && (kind & PropertyKind.Named)) {
-      var namedInterceptorNames =
-          %GetNamedInterceptorPropertyNames(this.value_);
-      if (namedInterceptorNames) {
-        propertyNames = propertyNames.concat(namedInterceptorNames);
-        total += namedInterceptorNames.length;
-      }
-    }
-  }
-
-  // Find all the indexed properties.
-  if (kind & PropertyKind.Indexed) {
-    // Get the local element names.
-    elementNames = %GetLocalElementNames(this.value_);
-    total += elementNames.length;
-
-    // Get names for indexed interceptor properties.
-    if (this.hasIndexedInterceptor() && (kind & PropertyKind.Indexed)) {
-      var indexedInterceptorNames =
-          %GetIndexedInterceptorElementNames(this.value_);
-      if (indexedInterceptorNames) {
-        elementNames = elementNames.concat(indexedInterceptorNames);
-        total += indexedInterceptorNames.length;
-      }
-    }
-  }
-  limit = Math.min(limit || total, total);
-
-  var names = new Array(limit);
-  var index = 0;
-
-  // Copy names for named properties.
-  if (kind & PropertyKind.Named) {
-    for (var i = 0; index < limit && i < propertyNames.length; i++) {
-      names[index++] = propertyNames[i];
-    }
-  }
-
-  // Copy names for indexed properties.
-  if (kind & PropertyKind.Indexed) {
-    for (var i = 0; index < limit && i < elementNames.length; i++) {
-      names[index++] = elementNames[i];
-    }
-  }
-
-  return names;
-};
-
-
-/**
- * Return the properties for this object as an array of PropertyMirror objects.
- * @param {number} kind Indicate whether named, indexed or both kinds of
- *     properties are requested
- * @param {number} limit Limit the number of properties returend to the
-       specified value
- * @return {Array} Property mirrors for this object
- */
-ObjectMirror.prototype.properties = function(kind, limit) {
-  var names = this.propertyNames(kind, limit);
-  var properties = new Array(names.length);
-  for (var i = 0; i < names.length; i++) {
-    properties[i] = this.property(names[i]);
-  }
-
-  return properties;
-};
-
-
-ObjectMirror.prototype.property = function(name) {
-  var details = %DebugGetPropertyDetails(this.value_, %ToString(name));
-  if (details) {
-    return new PropertyMirror(this, name, details);
-  }
-
-  // Nothing found.
-  return GetUndefinedMirror();
-};
-
-
-
-/**
- * Try to find a property from its value.
- * @param {Mirror} value The property value to look for
- * @return {PropertyMirror} The property with the specified value. If no
- *     property was found with the specified value UndefinedMirror is returned
- */
-ObjectMirror.prototype.lookupProperty = function(value) {
-  var properties = this.properties();
-
-  // Look for property value in properties.
-  for (var i = 0; i < properties.length; i++) {
-
-    // Skip properties which are defined through assessors.
-    var property = properties[i];
-    if (property.propertyType() != PropertyType.Callbacks) {
-      if (%_ObjectEquals(property.value_, value.value_)) {
-        return property;
-      }
-    }
-  }
-
-  // Nothing found.
-  return GetUndefinedMirror();
-};
-
-
-/**
- * Returns objects which has direct references to this object
- * @param {number} opt_max_objects Optional parameter specifying the maximum
- *     number of referencing objects to return.
- * @return {Array} The objects which has direct references to this object.
- */
-ObjectMirror.prototype.referencedBy = function(opt_max_objects) {
-  // Find all objects with direct references to this object.
-  var result = %DebugReferencedBy(this.value_,
-                                  Mirror.prototype, opt_max_objects || 0);
-
-  // Make mirrors for all the references found.
-  for (var i = 0; i < result.length; i++) {
-    result[i] = MakeMirror(result[i]);
-  }
-
-  return result;
-};
-
-
-ObjectMirror.prototype.toText = function() {
-  var name;
-  var ctor = this.constructorFunction();
-  if (!ctor.isFunction()) {
-    name = this.className();
-  } else {
-    name = ctor.name();
-    if (!name) {
-      name = this.className();
-    }
-  }
-  return '#<' + builtins.GetInstanceName(name) + '>';
-};
-
-
-/**
- * Mirror object for functions.
- * @param {function} value The function object reflected by this mirror.
- * @constructor
- * @extends ObjectMirror
- */
-function FunctionMirror(value) {
-  ObjectMirror.call(this, value, FUNCTION_TYPE);
-  this.resolved_ = true;
-}
-inherits(FunctionMirror, ObjectMirror);
-
-
-/**
- * Returns whether the function is resolved.
- * @return {boolean} True if the function is resolved. Unresolved functions can
- *     only originate as functions from stack frames
- */
-FunctionMirror.prototype.resolved = function() {
-  return this.resolved_;
-};
-
-
-/**
- * Returns the name of the function.
- * @return {string} Name of the function
- */
-FunctionMirror.prototype.name = function() {
-  return %FunctionGetName(this.value_);
-};
-
-
-/**
- * Returns the inferred name of the function.
- * @return {string} Name of the function
- */
-FunctionMirror.prototype.inferredName = function() {
-  return %FunctionGetInferredName(this.value_);
-};
-
-
-/**
- * Returns the source code for the function.
- * @return {string or undefined} The source code for the function. If the
- *     function is not resolved undefined will be returned.
- */
-FunctionMirror.prototype.source = function() {
-  // Return source if function is resolved. Otherwise just fall through to
-  // return undefined.
-  if (this.resolved()) {
-    return builtins.FunctionSourceString(this.value_);
-  }
-};
-
-
-/**
- * Returns the script object for the function.
- * @return {ScriptMirror or undefined} Script object for the function or
- *     undefined if the function has no script
- */
-FunctionMirror.prototype.script = function() {
-  // Return script if function is resolved. Otherwise just fall through
-  // to return undefined.
-  if (this.resolved()) {
-    var script = %FunctionGetScript(this.value_);
-    if (script) {
-      return MakeMirror(script);
-    }
-  }
-};
-
-
-/**
- * Returns the script source position for the function. Only makes sense
- * for functions which has a script defined.
- * @return {Number or undefined} in-script position for the function
- */
-FunctionMirror.prototype.sourcePosition_ = function() {
-  // Return script if function is resolved. Otherwise just fall through
-  // to return undefined.
-  if (this.resolved()) {
-    return %FunctionGetScriptSourcePosition(this.value_);
-  }
-};
-
-
-/**
- * Returns the script source location object for the function. Only makes sense
- * for functions which has a script defined.
- * @return {Location or undefined} in-script location for the function begin
- */
-FunctionMirror.prototype.sourceLocation = function() {
-  if (this.resolved() && this.script()) {
-    return this.script().locationFromPosition(this.sourcePosition_(),
-                                              true);
-  }
-};
-
-
-/**
- * Returns objects constructed by this function.
- * @param {number} opt_max_instances Optional parameter specifying the maximum
- *     number of instances to return.
- * @return {Array or undefined} The objects constructed by this function.
- */
-FunctionMirror.prototype.constructedBy = function(opt_max_instances) {
-  if (this.resolved()) {
-    // Find all objects constructed from this function.
-    var result = %DebugConstructedBy(this.value_, opt_max_instances || 0);
-
-    // Make mirrors for all the instances found.
-    for (var i = 0; i < result.length; i++) {
-      result[i] = MakeMirror(result[i]);
-    }
-
-    return result;
-  } else {
-    return [];
-  }
-};
-
-
-FunctionMirror.prototype.toText = function() {
-  return this.source();
-}
-
-
-/**
- * Mirror object for unresolved functions.
- * @param {string} value The name for the unresolved function reflected by this
- *     mirror.
- * @constructor
- * @extends ObjectMirror
- */
-function UnresolvedFunctionMirror(value) {
-  // Construct this using the ValueMirror as an unresolved function is not a
-  // real object but just a string.
-  ValueMirror.call(this, FUNCTION_TYPE, value);
-  this.propertyCount_ = 0;
-  this.elementCount_ = 0;
-  this.resolved_ = false;
-}
-inherits(UnresolvedFunctionMirror, FunctionMirror);
-
-
-UnresolvedFunctionMirror.prototype.className = function() {
-  return 'Function';
-};
-
-
-UnresolvedFunctionMirror.prototype.constructorFunction = function() {
-  return GetUndefinedMirror();
-};
-
-
-UnresolvedFunctionMirror.prototype.prototypeObject = function() {
-  return GetUndefinedMirror();
-};
-
-
-UnresolvedFunctionMirror.prototype.protoObject = function() {
-  return GetUndefinedMirror();
-};
-
-
-UnresolvedFunctionMirror.prototype.name = function() {
-  return this.value_;
-};
-
-
-UnresolvedFunctionMirror.prototype.inferredName = function() {
-  return undefined;
-};
-
-
-UnresolvedFunctionMirror.prototype.propertyNames = function(kind, limit) {
-  return [];
-}
-
-
-/**
- * Mirror object for arrays.
- * @param {Array} value The Array object reflected by this mirror
- * @constructor
- * @extends ObjectMirror
- */
-function ArrayMirror(value) {
-  ObjectMirror.call(this, value);
-}
-inherits(ArrayMirror, ObjectMirror);
-
-
-ArrayMirror.prototype.length = function() {
-  return this.value_.length;
-};
-
-
-ArrayMirror.prototype.indexedPropertiesFromRange = function(opt_from_index, opt_to_index) {
-  var from_index = opt_from_index || 0;
-  var to_index = opt_to_index || this.length() - 1;
-  if (from_index > to_index) return new Array();
-  var values = new Array(to_index - from_index + 1);
-  for (var i = from_index; i <= to_index; i++) {
-    var details = %DebugGetPropertyDetails(this.value_, %ToString(i));
-    var value;
-    if (details) {
-      value = new PropertyMirror(this, i, details);
-    } else {
-      value = GetUndefinedMirror();
-    }
-    values[i - from_index] = value;
-  }
-  return values;
-}
-
-
-/**
- * Mirror object for dates.
- * @param {Date} value The Date object reflected by this mirror
- * @constructor
- * @extends ObjectMirror
- */
-function DateMirror(value) {
-  ObjectMirror.call(this, value);
-}
-inherits(DateMirror, ObjectMirror);
-
-
-DateMirror.prototype.toText = function() {
-  var s = JSON.stringify(this.value_);
-  return s.substring(1, s.length - 1);  // cut quotes
-}
-
-
-/**
- * Mirror object for regular expressions.
- * @param {RegExp} value The RegExp object reflected by this mirror
- * @constructor
- * @extends ObjectMirror
- */
-function RegExpMirror(value) {
-  ObjectMirror.call(this, value, REGEXP_TYPE);
-}
-inherits(RegExpMirror, ObjectMirror);
-
-
-/**
- * Returns the source to the regular expression.
- * @return {string or undefined} The source to the regular expression
- */
-RegExpMirror.prototype.source = function() {
-  return this.value_.source;
-};
-
-
-/**
- * Returns whether this regular expression has the global (g) flag set.
- * @return {boolean} Value of the global flag
- */
-RegExpMirror.prototype.global = function() {
-  return this.value_.global;
-};
-
-
-/**
- * Returns whether this regular expression has the ignore case (i) flag set.
- * @return {boolean} Value of the ignore case flag
- */
-RegExpMirror.prototype.ignoreCase = function() {
-  return this.value_.ignoreCase;
-};
-
-
-/**
- * Returns whether this regular expression has the multiline (m) flag set.
- * @return {boolean} Value of the multiline flag
- */
-RegExpMirror.prototype.multiline = function() {
-  return this.value_.multiline;
-};
-
-
-RegExpMirror.prototype.toText = function() {
-  // Simpel to text which is used when on specialization in subclass.
-  return "/" + this.source() + "/";
-}
-
-
-/**
- * Mirror object for error objects.
- * @param {Error} value The error object reflected by this mirror
- * @constructor
- * @extends ObjectMirror
- */
-function ErrorMirror(value) {
-  ObjectMirror.call(this, value, ERROR_TYPE);
-}
-inherits(ErrorMirror, ObjectMirror);
-
-
-/**
- * Returns the message for this eror object.
- * @return {string or undefined} The message for this eror object
- */
-ErrorMirror.prototype.message = function() {
-  return this.value_.message;
-};
-
-
-ErrorMirror.prototype.toText = function() {
-  // Use the same text representation as in messages.js.
-  var text;
-  try {
-    str = builtins.ToDetailString(this.value_);
-  } catch (e) {
-    str = '#<an Error>';
-  }
-  return str;
-}
-
-
-/**
- * Base mirror object for properties.
- * @param {ObjectMirror} mirror The mirror object having this property
- * @param {string} name The name of the property
- * @param {Array} details Details about the property
- * @constructor
- * @extends Mirror
- */
-function PropertyMirror(mirror, name, details) {
-  Mirror.call(this, PROPERTY_TYPE);
-  this.mirror_ = mirror;
-  this.name_ = name;
-  this.value_ = details[0];
-  this.details_ = details[1];
-  if (details.length > 2) {
-    this.exception_ = details[2]
-    this.getter_ = details[3];
-    this.setter_ = details[4];
-  }
-}
-inherits(PropertyMirror, Mirror);
-
-
-PropertyMirror.prototype.isReadOnly = function() {
-  return (this.attributes() & PropertyAttribute.ReadOnly) != 0;
-}
-
-
-PropertyMirror.prototype.isEnum = function() {
-  return (this.attributes() & PropertyAttribute.DontEnum) == 0;
-}
-
-
-PropertyMirror.prototype.canDelete = function() {
-  return (this.attributes() & PropertyAttribute.DontDelete) == 0;
-}
-
-
-PropertyMirror.prototype.name = function() {
-  return this.name_;
-}
-
-
-PropertyMirror.prototype.isIndexed = function() {
-  for (var i = 0; i < this.name_.length; i++) {
-    if (this.name_[i] < '0' || '9' < this.name_[i]) {
-      return false;
-    }
-  }
-  return true;
-}
-
-
-PropertyMirror.prototype.value = function() {
-  return MakeMirror(this.value_, false);
-}
-
-
-/**
- * Returns whether this property value is an exception.
- * @return {booolean} True if this property value is an exception
- */
-PropertyMirror.prototype.isException = function() {
-  return this.exception_ ? true : false;
-}
-
-
-PropertyMirror.prototype.attributes = function() {
-  return %DebugPropertyAttributesFromDetails(this.details_);
-}
-
-
-PropertyMirror.prototype.propertyType = function() {
-  return %DebugPropertyTypeFromDetails(this.details_);
-}
-
-
-PropertyMirror.prototype.insertionIndex = function() {
-  return %DebugPropertyIndexFromDetails(this.details_);
-}
-
-
-/**
- * Returns whether this property has a getter defined through __defineGetter__.
- * @return {booolean} True if this property has a getter
- */
-PropertyMirror.prototype.hasGetter = function() {
-  return this.getter_ ? true : false;
-}
-
-
-/**
- * Returns whether this property has a setter defined through __defineSetter__.
- * @return {booolean} True if this property has a setter
- */
-PropertyMirror.prototype.hasSetter = function() {
-  return this.setter_ ? true : false;
-}
-
-
-/**
- * Returns the getter for this property defined through __defineGetter__.
- * @return {Mirror} FunctionMirror reflecting the getter function or
- *     UndefinedMirror if there is no getter for this property
- */
-PropertyMirror.prototype.getter = function() {
-  if (this.hasGetter()) {
-    return MakeMirror(this.getter_);
-  } else {
-    return GetUndefinedMirror();
-  }
-}
-
-
-/**
- * Returns the setter for this property defined through __defineSetter__.
- * @return {Mirror} FunctionMirror reflecting the setter function or
- *     UndefinedMirror if there is no setter for this property
- */
-PropertyMirror.prototype.setter = function() {
-  if (this.hasSetter()) {
-    return MakeMirror(this.setter_);
-  } else {
-    return GetUndefinedMirror();
-  }
-}
-
-
-/**
- * Returns whether this property is natively implemented by the host or a set
- * through JavaScript code.
- * @return {boolean} True if the property is 
- *     UndefinedMirror if there is no setter for this property
- */
-PropertyMirror.prototype.isNative = function() {
-  return (this.propertyType() == PropertyType.Interceptor) ||
-         ((this.propertyType() == PropertyType.Callbacks) &&
-          !this.hasGetter() && !this.hasSetter());
-}
-
-
-const kFrameDetailsFrameIdIndex = 0;
-const kFrameDetailsReceiverIndex = 1;
-const kFrameDetailsFunctionIndex = 2;
-const kFrameDetailsArgumentCountIndex = 3;
-const kFrameDetailsLocalCountIndex = 4;
-const kFrameDetailsSourcePositionIndex = 5;
-const kFrameDetailsConstructCallIndex = 6;
-const kFrameDetailsDebuggerFrameIndex = 7;
-const kFrameDetailsFirstDynamicIndex = 8;
-
-const kFrameDetailsNameIndex = 0;
-const kFrameDetailsValueIndex = 1;
-const kFrameDetailsNameValueSize = 2;
-
-/**
- * Wrapper for the frame details information retreived from the VM. The frame
- * details from the VM is an array with the following content. See runtime.cc
- * Runtime_GetFrameDetails.
- *     0: Id
- *     1: Receiver
- *     2: Function
- *     3: Argument count
- *     4: Local count
- *     5: Source position
- *     6: Construct call
- *     Arguments name, value
- *     Locals name, value
- * @param {number} break_id Current break id
- * @param {number} index Frame number
- * @constructor
- */
-function FrameDetails(break_id, index) {
-  this.break_id_ = break_id;
-  this.details_ = %GetFrameDetails(break_id, index);
-}
-
-
-FrameDetails.prototype.frameId = function() {
-  %CheckExecutionState(this.break_id_);
-  return this.details_[kFrameDetailsFrameIdIndex];
-}
-
-
-FrameDetails.prototype.receiver = function() {
-  %CheckExecutionState(this.break_id_);
-  return this.details_[kFrameDetailsReceiverIndex];
-}
-
-
-FrameDetails.prototype.func = function() {
-  %CheckExecutionState(this.break_id_);
-  return this.details_[kFrameDetailsFunctionIndex];
-}
-
-
-FrameDetails.prototype.isConstructCall = function() {
-  %CheckExecutionState(this.break_id_);
-  return this.details_[kFrameDetailsConstructCallIndex];
-}
-
-
-FrameDetails.prototype.isDebuggerFrame = function() {
-  %CheckExecutionState(this.break_id_);
-  return this.details_[kFrameDetailsDebuggerFrameIndex];
-}
-
-
-FrameDetails.prototype.argumentCount = function() {
-  %CheckExecutionState(this.break_id_);
-  return this.details_[kFrameDetailsArgumentCountIndex];
-}
-
-
-FrameDetails.prototype.argumentName = function(index) {
-  %CheckExecutionState(this.break_id_);
-  if (index >= 0 && index < this.argumentCount()) {
-    return this.details_[kFrameDetailsFirstDynamicIndex +
-                         index * kFrameDetailsNameValueSize +
-                         kFrameDetailsNameIndex]
-  }
-}
-
-
-FrameDetails.prototype.argumentValue = function(index) {
-  %CheckExecutionState(this.break_id_);
-  if (index >= 0 && index < this.argumentCount()) {
-    return this.details_[kFrameDetailsFirstDynamicIndex +
-                         index * kFrameDetailsNameValueSize +
-                         kFrameDetailsValueIndex]
-  }
-}
-
-
-FrameDetails.prototype.localCount = function() {
-  %CheckExecutionState(this.break_id_);
-  return this.details_[kFrameDetailsLocalCountIndex];
-}
-
-
-FrameDetails.prototype.sourcePosition = function() {
-  %CheckExecutionState(this.break_id_);
-  return this.details_[kFrameDetailsSourcePositionIndex];
-}
-
-
-FrameDetails.prototype.localName = function(index) {
-  %CheckExecutionState(this.break_id_);
-  if (index >= 0 && index < this.localCount()) {
-    var locals_offset = kFrameDetailsFirstDynamicIndex + this.argumentCount() * kFrameDetailsNameValueSize
-    return this.details_[locals_offset +
-                         index * kFrameDetailsNameValueSize +
-                         kFrameDetailsNameIndex]
-  }
-}
-
-
-FrameDetails.prototype.localValue = function(index) {
-  %CheckExecutionState(this.break_id_);
-  if (index >= 0 && index < this.localCount()) {
-    var locals_offset = kFrameDetailsFirstDynamicIndex + this.argumentCount() * kFrameDetailsNameValueSize
-    return this.details_[locals_offset +
-                         index * kFrameDetailsNameValueSize +
-                         kFrameDetailsValueIndex]
-  }
-}
-
-
-FrameDetails.prototype.scopeCount = function() {
-  return %GetScopeCount(this.break_id_, this.frameId());
-}
-
-
-/**
- * Mirror object for stack frames.
- * @param {number} break_id The break id in the VM for which this frame is
-       valid
- * @param {number} index The frame index (top frame is index 0)
- * @constructor
- * @extends Mirror
- */
-function FrameMirror(break_id, index) {
-  Mirror.call(this, FRAME_TYPE);
-  this.break_id_ = break_id;
-  this.index_ = index;
-  this.details_ = new FrameDetails(break_id, index);
-}
-inherits(FrameMirror, Mirror);
-
-
-FrameMirror.prototype.index = function() {
-  return this.index_;
-};
-
-
-FrameMirror.prototype.func = function() {
-  // Get the function for this frame from the VM.
-  var f = this.details_.func();
-  
-  // Create a function mirror. NOTE: MakeMirror cannot be used here as the
-  // value returned from the VM might be a string if the function for the
-  // frame is unresolved.
-  if (IS_FUNCTION(f)) {
-    return MakeMirror(f);
-  } else {
-    return new UnresolvedFunctionMirror(f);
-  }
-};
-
-
-FrameMirror.prototype.receiver = function() {
-  return MakeMirror(this.details_.receiver());
-};
-
-
-FrameMirror.prototype.isConstructCall = function() {
-  return this.details_.isConstructCall();
-};
-
-
-FrameMirror.prototype.isDebuggerFrame = function() {
-  return this.details_.isDebuggerFrame();
-};
-
-
-FrameMirror.prototype.argumentCount = function() {
-  return this.details_.argumentCount();
-};
-
-
-FrameMirror.prototype.argumentName = function(index) {
-  return this.details_.argumentName(index);
-};
-
-
-FrameMirror.prototype.argumentValue = function(index) {
-  return MakeMirror(this.details_.argumentValue(index));
-};
-
-
-FrameMirror.prototype.localCount = function() {
-  return this.details_.localCount();
-};
-
-
-FrameMirror.prototype.localName = function(index) {
-  return this.details_.localName(index);
-};
-
-
-FrameMirror.prototype.localValue = function(index) {
-  return MakeMirror(this.details_.localValue(index));
-};
-
-
-FrameMirror.prototype.sourcePosition = function() {
-  return this.details_.sourcePosition();
-};
-
-
-FrameMirror.prototype.sourceLocation = function() {
-  if (this.func().resolved() && this.func().script()) {
-    return this.func().script().locationFromPosition(this.sourcePosition(),
-                                                     true);
-  }
-};
-
-
-FrameMirror.prototype.sourceLine = function() {
-  if (this.func().resolved()) {
-    var location = this.sourceLocation();
-    if (location) {
-      return location.line;
-    }
-  }
-};
-
-
-FrameMirror.prototype.sourceColumn = function() {
-  if (this.func().resolved()) {
-    var location = this.sourceLocation();
-    if (location) {
-      return location.column;
-    }
-  }
-};
-
-
-FrameMirror.prototype.sourceLineText = function() {
-  if (this.func().resolved()) {
-    var location = this.sourceLocation();
-    if (location) {
-      return location.sourceText();
-    }
-  }
-};
-
-
-FrameMirror.prototype.scopeCount = function() {
-  return this.details_.scopeCount();
-};
-
-
-FrameMirror.prototype.scope = function(index) {
-  return new ScopeMirror(this, index);
-};
-
-
-FrameMirror.prototype.evaluate = function(source, disable_break) {
-  var result = %DebugEvaluate(this.break_id_, this.details_.frameId(),
-                              source, Boolean(disable_break));
-  return MakeMirror(result);
-};
-
-
-FrameMirror.prototype.invocationText = function() {
-  // Format frame invoaction (receiver, function and arguments).
-  var result = '';
-  var func = this.func();
-  var receiver = this.receiver();
-  if (this.isConstructCall()) {
-    // For constructor frames display new followed by the function name.
-    result += 'new ';
-    result += func.name() ? func.name() : '[anonymous]';
-  } else if (this.isDebuggerFrame()) {
-    result += '[debugger]';
-  } else {
-    // If the receiver has a className which is 'global' don't display it.
-    var display_receiver = !receiver.className || receiver.className() != 'global';
-    if (display_receiver) {
-      result += receiver.toText();
-    }
-    // Try to find the function as a property in the receiver. Include the
-    // prototype chain in the lookup.
-    var property = GetUndefinedMirror();
-    if (!receiver.isUndefined()) {
-      for (var r = receiver; !r.isNull() && property.isUndefined(); r = r.protoObject()) {
-        property = r.lookupProperty(func);
-      }
-    }
-    if (!property.isUndefined()) {
-      // The function invoked was found on the receiver. Use the property name
-      // for the backtrace.
-      if (!property.isIndexed()) {
-        if (display_receiver) {
-          result += '.';
-        }
-        result += property.name();
-      } else {
-        result += '[';
-        result += property.name();
-        result += ']';
-      }
-      // Also known as - if the name in the function doesn't match the name
-      // under which it was looked up.
-      if (func.name() && func.name() != property.name()) {
-        result += '(aka ' + func.name() + ')';
-      }
-    } else {
-      // The function invoked was not found on the receiver. Use the function
-      // name if available for the backtrace.
-      if (display_receiver) {
-        result += '.';
-      }
-      result += func.name() ? func.name() : '[anonymous]';
-    }
-  }
-
-  // Render arguments for normal frames.
-  if (!this.isDebuggerFrame()) {
-    result += '(';
-    for (var i = 0; i < this.argumentCount(); i++) {
-      if (i != 0) result += ', ';
-      if (this.argumentName(i)) {
-        result += this.argumentName(i);
-        result += '=';
-      }
-      result += this.argumentValue(i).toText();
-    }
-    result += ')';
-  }
-
-  return result;
-}
-
-
-FrameMirror.prototype.sourceAndPositionText = function() {
-  // Format source and position.
-  var result = '';
-  var func = this.func();
-  if (func.resolved()) {
-    if (func.script()) {
-      if (func.script().name()) {
-        result += func.script().name();
-      } else {
-        result += '[unnamed]';
-      }
-      if (!this.isDebuggerFrame()) {
-        var location = this.sourceLocation();
-        result += ' line ';
-        result += !IS_UNDEFINED(location) ? (location.line + 1) : '?';
-        result += ' column ';
-        result += !IS_UNDEFINED(location) ? (location.column + 1) : '?';
-        if (!IS_UNDEFINED(this.sourcePosition())) {
-          result += ' (position ' + (this.sourcePosition() + 1) + ')';
-        }
-      }
-    } else {
-      result += '[no source]';
-    }
-  } else {
-    result += '[unresolved]';
-  }
-
-  return result;
-}
-
-
-FrameMirror.prototype.localsText = function() {
-  // Format local variables.
-  var result = '';
-  var locals_count = this.localCount()
-  if (locals_count > 0) {
-    for (var i = 0; i < locals_count; ++i) {
-      result += '      var ';
-      result += this.localName(i);
-      result += ' = ';
-      result += this.localValue(i).toText();
-      if (i < locals_count - 1) result += '\n';
-    }
-  }
-
-  return result;
-}
-
-
-FrameMirror.prototype.toText = function(opt_locals) {
-  var result = '';
-  result += '#' + (this.index() <= 9 ? '0' : '') + this.index();
-  result += ' ';
-  result += this.invocationText();
-  result += ' ';
-  result += this.sourceAndPositionText();
-  if (opt_locals) {
-    result += '\n';
-    result += this.localsText();
-  }
-  return result;
-}
-
-
-const kScopeDetailsTypeIndex = 0;
-const kScopeDetailsObjectIndex = 1;
-
-function ScopeDetails(frame, index) {
-  this.break_id_ = frame.break_id_;
-  this.details_ = %GetScopeDetails(frame.break_id_,
-                                   frame.details_.frameId(),
-                                   index);
-}
-
-
-ScopeDetails.prototype.type = function() {
-  %CheckExecutionState(this.break_id_);
-  return this.details_[kScopeDetailsTypeIndex];
-}
-
-
-ScopeDetails.prototype.object = function() {
-  %CheckExecutionState(this.break_id_);
-  return this.details_[kScopeDetailsObjectIndex];
-}
-
-
-/**
- * Mirror object for scope.
- * @param {FrameMirror} frame The frame this scope is a part of
- * @param {number} index The scope index in the frame
- * @constructor
- * @extends Mirror
- */
-function ScopeMirror(frame, index) {
-  Mirror.call(this, SCOPE_TYPE);
-  this.frame_index_ = frame.index_;
-  this.scope_index_ = index;
-  this.details_ = new ScopeDetails(frame, index);
-}
-inherits(ScopeMirror, Mirror);
-
-
-ScopeMirror.prototype.frameIndex = function() {
-  return this.frame_index_;
-};
-
-
-ScopeMirror.prototype.scopeIndex = function() {
-  return this.scope_index_;
-};
-
-
-ScopeMirror.prototype.scopeType = function() {
-  return this.details_.type();
-};
-
-
-ScopeMirror.prototype.scopeObject = function() {
-  // For local and closure scopes create a transient mirror as these objects are
-  // created on the fly materializing the local or closure scopes and
-  // therefore will not preserve identity.
-  var transient = this.scopeType() == ScopeType.Local ||
-                  this.scopeType() == ScopeType.Closure;
-  return MakeMirror(this.details_.object(), transient);
-};
-
-
-/**
- * Mirror object for script source.
- * @param {Script} script The script object
- * @constructor
- * @extends Mirror
- */
-function ScriptMirror(script) {
-  Mirror.call(this, SCRIPT_TYPE);
-  this.script_ = script;
-  this.context_ = new ContextMirror(script.context_data);
-  this.allocateHandle_();
-}
-inherits(ScriptMirror, Mirror);
-
-
-ScriptMirror.prototype.value = function() {
-  return this.script_;
-};
-
-
-ScriptMirror.prototype.name = function() {
-  return this.script_.name;
-};
-
-
-ScriptMirror.prototype.id = function() {
-  return this.script_.id;
-};
-
-
-ScriptMirror.prototype.source = function() {
-  return this.script_.source;
-};
-
-
-ScriptMirror.prototype.lineOffset = function() {
-  return this.script_.line_offset;
-};
-
-
-ScriptMirror.prototype.columnOffset = function() {
-  return this.script_.column_offset;
-};
-
-
-ScriptMirror.prototype.data = function() {
-  return this.script_.data;
-};
-
-
-ScriptMirror.prototype.scriptType = function() {
-  return this.script_.type;
-};
-
-
-ScriptMirror.prototype.compilationType = function() {
-  return this.script_.compilation_type;
-};
-
-
-ScriptMirror.prototype.lineCount = function() {
-  return this.script_.lineCount();
-};
-
-
-ScriptMirror.prototype.locationFromPosition = function(
-    position, include_resource_offset) {
-  return this.script_.locationFromPosition(position, include_resource_offset);
-}
-
-
-ScriptMirror.prototype.sourceSlice = function (opt_from_line, opt_to_line) {
-  return this.script_.sourceSlice(opt_from_line, opt_to_line);
-}
-
-
-ScriptMirror.prototype.context = function() {
-  return this.context_;
-};
-
-
-ScriptMirror.prototype.evalFromScript = function() {
-  return MakeMirror(this.script_.eval_from_script);
-};
-
-
-ScriptMirror.prototype.evalFromFunctionName = function() {
-  return MakeMirror(this.script_.eval_from_function_name);
-};
-
-
-ScriptMirror.prototype.evalFromLocation = function() {
-  var eval_from_script = this.evalFromScript();
-  if (!eval_from_script.isUndefined()) {
-    var position = this.script_.eval_from_script_position;
-    return eval_from_script.locationFromPosition(position, true);
-  }
-};
-
-
-ScriptMirror.prototype.toText = function() {
-  var result = '';
-  result += this.name();
-  result += ' (lines: ';
-  if (this.lineOffset() > 0) {
-    result += this.lineOffset();
-    result += '-';
-    result += this.lineOffset() + this.lineCount() - 1;
-  } else {
-    result += this.lineCount();
-  }
-  result += ')';
-  return result;
-}
-
-
-/**
- * Mirror object for context.
- * @param {Object} data The context data
- * @constructor
- * @extends Mirror
- */
-function ContextMirror(data) {
-  Mirror.call(this, CONTEXT_TYPE);
-  this.data_ = data;
-  this.allocateHandle_();
-}
-inherits(ContextMirror, Mirror);
-
-
-ContextMirror.prototype.data = function() {
-  return this.data_;
-};
-
-
-/**
- * Returns a mirror serializer
- *
- * @param {boolean} details Set to true to include details
- * @param {Object} options Options comtrolling the serialization
- *     The following options can be set:
- *       includeSource: include ths full source of scripts
- * @returns {MirrorSerializer} mirror serializer
- */
-function MakeMirrorSerializer(details, options) {
-  return new JSONProtocolSerializer(details, options);
-}
-
-
-/**
- * Object for serializing a mirror objects and its direct references.
- * @param {boolean} details Indicates whether to include details for the mirror
- *     serialized
- * @constructor
- */
-function JSONProtocolSerializer(details, options) {
-  this.details_ = details;
-  this.options_ = options;
-  this.mirrors_ = [ ];
-}
-
-
-/**
- * Returns a serialization of an object reference. The referenced object are
- * added to the serialization state.
- *
- * @param {Mirror} mirror The mirror to serialize
- * @returns {String} JSON serialization
- */
-JSONProtocolSerializer.prototype.serializeReference = function(mirror) {
-  return this.serialize_(mirror, true, true);
-}
-
-
-/**
- * Returns a serialization of an object value. The referenced objects are
- * added to the serialization state.
- *
- * @param {Mirror} mirror The mirror to serialize
- * @returns {String} JSON serialization
- */
-JSONProtocolSerializer.prototype.serializeValue = function(mirror) {
-  var json = this.serialize_(mirror, false, true);
-  return json;
-}
-
-
-/**
- * Returns a serialization of all the objects referenced.
- *
- * @param {Mirror} mirror The mirror to serialize.
- * @returns {Array.<Object>} Array of the referenced objects converted to
- *     protcol objects.
- */
-JSONProtocolSerializer.prototype.serializeReferencedObjects = function() {
-  // Collect the protocol representation of the referenced objects in an array.
-  var content = [];
-  
-  // Get the number of referenced objects.
-  var count = this.mirrors_.length;
-  
-  for (var i = 0; i < count; i++) {
-    content.push(this.serialize_(this.mirrors_[i], false, false));
-  }
-
-  return content;
-}
-
-
-JSONProtocolSerializer.prototype.includeSource_ = function() {
-  return this.options_ && this.options_.includeSource;
-}
-
-
-JSONProtocolSerializer.prototype.inlineRefs_ = function() {
-  return this.options_ && this.options_.inlineRefs;
-}
-
-
-JSONProtocolSerializer.prototype.add_ = function(mirror) {
-  // If this mirror is already in the list just return.
-  for (var i = 0; i < this.mirrors_.length; i++) {
-    if (this.mirrors_[i] === mirror) {
-      return;
-    }
-  }
-  
-  // Add the mirror to the list of mirrors to be serialized.
-  this.mirrors_.push(mirror);
-}
-
-
-/**
- * Formats mirror object to protocol reference object with some data that can
- * be used to display the value in debugger.
- * @param {Mirror} mirror Mirror to serialize.
- * @return {Object} Protocol reference object.
- */
-JSONProtocolSerializer.prototype.serializeReferenceWithDisplayData_ = 
-    function(mirror) {
-  var o = {};
-  o.ref = mirror.handle();
-  o.type = mirror.type();
-  switch (mirror.type()) {
-    case UNDEFINED_TYPE:
-    case NULL_TYPE:
-    case BOOLEAN_TYPE:
-    case NUMBER_TYPE:
-      o.value = mirror.value();
-      break;
-    case STRING_TYPE:
-      // Limit string length.
-      o.value = mirror.toText();
-      break;
-    case FUNCTION_TYPE:
-      o.name = mirror.name();
-      o.inferredName = mirror.inferredName();
-      if (mirror.script()) {
-        o.scriptId = mirror.script().id();
-      }
-      break;
-    case ERROR_TYPE:
-    case REGEXP_TYPE:
-      o.value = mirror.toText();
-      break;
-    case OBJECT_TYPE:
-      o.className = mirror.className();
-      break;
-  }
-  return o;
-};
-
-
-JSONProtocolSerializer.prototype.serialize_ = function(mirror, reference,
-                                                       details) {
-  // If serializing a reference to a mirror just return the reference and add
-  // the mirror to the referenced mirrors.
-  if (reference &&
-      (mirror.isValue() || mirror.isScript() || mirror.isContext())) {
-    if (this.inlineRefs_() && mirror.isValue()) {
-      return this.serializeReferenceWithDisplayData_(mirror);
-    } else {
-      this.add_(mirror);
-      return {'ref' : mirror.handle()};
-    }
-  }
-  
-  // Collect the JSON property/value pairs.
-  var content = {};
-
-  // Add the mirror handle.
-  if (mirror.isValue() || mirror.isScript() || mirror.isContext()) {
-    content.handle = mirror.handle();
-  }
-
-  // Always add the type.
-  content.type = mirror.type();
-
-  switch (mirror.type()) {
-    case UNDEFINED_TYPE:
-    case NULL_TYPE:
-      // Undefined and null are represented just by their type.
-      break;
-
-    case BOOLEAN_TYPE:
-      // Boolean values are simply represented by their value.
-      content.value = mirror.value();
-      break;
-
-    case NUMBER_TYPE:
-      // Number values are simply represented by their value.
-      content.value = NumberToJSON_(mirror.value());
-      break;
-
-    case STRING_TYPE:
-      // String values might have their value cropped to keep down size.
-      if (mirror.length() > kMaxProtocolStringLength) {
-        var str = mirror.value().substring(0, kMaxProtocolStringLength);
-        content.value = str;
-        content.fromIndex = 0;
-        content.toIndex = kMaxProtocolStringLength;
-      } else {
-        content.value = mirror.value();
-      }
-      content.length = mirror.length();
-      break;
-
-    case OBJECT_TYPE:
-    case FUNCTION_TYPE:
-    case ERROR_TYPE:
-    case REGEXP_TYPE:
-      // Add object representation.
-      this.serializeObject_(mirror, content, details);
-      break;
-
-    case PROPERTY_TYPE:
-      throw new Error('PropertyMirror cannot be serialized independeltly')
-      break;
-
-    case FRAME_TYPE:
-      // Add object representation.
-      this.serializeFrame_(mirror, content);
-      break;
-
-    case SCOPE_TYPE:
-      // Add object representation.
-      this.serializeScope_(mirror, content);
-      break;
-
-    case SCRIPT_TYPE:
-      // Script is represented by id, name and source attributes.
-      if (mirror.name()) {
-        content.name = mirror.name();
-      }
-      content.id = mirror.id();
-      content.lineOffset = mirror.lineOffset();
-      content.columnOffset = mirror.columnOffset();
-      content.lineCount = mirror.lineCount();
-      if (mirror.data()) {
-        content.data = mirror.data();
-      }
-      if (this.includeSource_()) {
-        content.source = mirror.source();
-      } else {
-        var sourceStart = mirror.source().substring(0, 80);
-        content.sourceStart = sourceStart;
-      }
-      content.sourceLength = mirror.source().length;
-      content.scriptType = mirror.scriptType();
-      content.compilationType = mirror.compilationType();
-      // For compilation type eval emit information on the script from which
-      // eval was called if a script is present.
-      if (mirror.compilationType() == 1 &&
-          mirror.evalFromScript()) {
-        content.evalFromScript =
-            this.serializeReference(mirror.evalFromScript());
-        var evalFromLocation = mirror.evalFromLocation()
-        if (evalFromLocation) {
-          content.evalFromLocation = { line: evalFromLocation.line,
-                                       column: evalFromLocation.column };
-        }
-        if (mirror.evalFromFunctionName()) {
-          content.evalFromFunctionName = mirror.evalFromFunctionName();
-        }
-      }
-      if (mirror.context()) {
-        content.context = this.serializeReference(mirror.context());
-      }
-      break;
-
-    case CONTEXT_TYPE:
-      content.data = mirror.data();
-      break;
-  }
-
-  // Always add the text representation.
-  content.text = mirror.toText();
-  
-  // Create and return the JSON string.
-  return content;
-}
-
-
-/**
- * Serialize object information to the following JSON format.
- *
- *   {"className":"<class name>",
- *    "constructorFunction":{"ref":<number>},
- *    "protoObject":{"ref":<number>},
- *    "prototypeObject":{"ref":<number>},
- *    "namedInterceptor":<boolean>,
- *    "indexedInterceptor":<boolean>,
- *    "properties":[<properties>]}
- */
-JSONProtocolSerializer.prototype.serializeObject_ = function(mirror, content,
-                                                             details) {
-  // Add general object properties.
-  content.className = mirror.className();
-  content.constructorFunction =
-      this.serializeReference(mirror.constructorFunction());
-  content.protoObject = this.serializeReference(mirror.protoObject());
-  content.prototypeObject = this.serializeReference(mirror.prototypeObject());
-
-  // Add flags to indicate whether there are interceptors.
-  if (mirror.hasNamedInterceptor()) {
-    content.namedInterceptor = true;
-  }
-  if (mirror.hasIndexedInterceptor()) {
-    content.indexedInterceptor = true;
-  }
-  
-  // Add function specific properties.
-  if (mirror.isFunction()) {
-    // Add function specific properties.
-    content.name = mirror.name();
-    if (!IS_UNDEFINED(mirror.inferredName())) {
-      content.inferredName = mirror.inferredName();
-    }
-    content.resolved = mirror.resolved();
-    if (mirror.resolved()) {
-      content.source = mirror.source();
-    }
-    if (mirror.script()) {
-      content.script = this.serializeReference(mirror.script());
-      content.scriptId = mirror.script().id();
-      
-      serializeLocationFields(mirror.sourceLocation(), content);
-    }
-  }
-
-  // Add date specific properties.
-  if (mirror.isDate()) {
-    // Add date specific properties.
-    content.value = mirror.value();
-  }
-
-  // Add actual properties - named properties followed by indexed properties.
-  var propertyNames = mirror.propertyNames(PropertyKind.Named);
-  var propertyIndexes = mirror.propertyNames(PropertyKind.Indexed);
-  var p = new Array(propertyNames.length + propertyIndexes.length);
-  for (var i = 0; i < propertyNames.length; i++) {
-    var propertyMirror = mirror.property(propertyNames[i]);
-    p[i] = this.serializeProperty_(propertyMirror);
-    if (details) {
-      this.add_(propertyMirror.value());
-    }
-  }
-  for (var i = 0; i < propertyIndexes.length; i++) {
-    var propertyMirror = mirror.property(propertyIndexes[i]);
-    p[propertyNames.length + i] = this.serializeProperty_(propertyMirror);
-    if (details) {
-      this.add_(propertyMirror.value());
-    }
-  }
-  content.properties = p;
-}
-
-
-/**
- * Serialize location information to the following JSON format:
- *
- *   "position":"<position>",
- *   "line":"<line>",
- *   "column":"<column>",
- * 
- * @param {SourceLocation} location The location to serialize, may be undefined.
- */
-function serializeLocationFields (location, content) {
-  if (!location) {
-    return;
-  }                                                                     
-  content.position = location.position;
-  var line = location.line;
-  if (!IS_UNDEFINED(line)) {
-    content.line = line;
-  }
-  var column = location.column;
-  if (!IS_UNDEFINED(column)) {
-    content.column = column;
-  }
-}
-
-
-/**
- * Serialize property information to the following JSON format for building the
- * array of properties.
- *
- *   {"name":"<property name>",
- *    "attributes":<number>,
- *    "propertyType":<number>,
- *    "ref":<number>}
- *
- * If the attribute for the property is PropertyAttribute.None it is not added.
- * If the propertyType for the property is PropertyType.Normal it is not added.
- * Here are a couple of examples.
- *
- *   {"name":"hello","ref":1}
- *   {"name":"length","attributes":7,"propertyType":3,"ref":2}
- *
- * @param {PropertyMirror} propertyMirror The property to serialize.
- * @returns {Object} Protocol object representing the property.
- */
-JSONProtocolSerializer.prototype.serializeProperty_ = function(propertyMirror) {
-  var result = {};
-  
-  result.name = propertyMirror.name();
-  var propertyValue = propertyMirror.value();
-  if (this.inlineRefs_() && propertyValue.isValue()) {
-    result.value = this.serializeReferenceWithDisplayData_(propertyValue);
-  } else {
-    if (propertyMirror.attributes() != PropertyAttribute.None) {
-      result.attributes = propertyMirror.attributes();
-    }
-    if (propertyMirror.propertyType() != PropertyType.Normal) {
-      result.propertyType = propertyMirror.propertyType();
-    }
-    result.ref = propertyValue.handle();
-  }
-  return result;
-}
-
-
-JSONProtocolSerializer.prototype.serializeFrame_ = function(mirror, content) {
-  content.index = mirror.index();
-  content.receiver = this.serializeReference(mirror.receiver());
-  var func = mirror.func();
-  content.func = this.serializeReference(func);
-  if (func.script()) {
-    content.script = this.serializeReference(func.script());
-  }
-  content.constructCall = mirror.isConstructCall();
-  content.debuggerFrame = mirror.isDebuggerFrame();
-  var x = new Array(mirror.argumentCount());
-  for (var i = 0; i < mirror.argumentCount(); i++) {
-    var arg = {};
-    var argument_name = mirror.argumentName(i)
-    if (argument_name) {
-      arg.name = argument_name;
-    }
-    arg.value = this.serializeReference(mirror.argumentValue(i));
-    x[i] = arg;
-  }
-  content.arguments = x;
-  var x = new Array(mirror.localCount());
-  for (var i = 0; i < mirror.localCount(); i++) {
-    var local = {};
-    local.name = mirror.localName(i);
-    local.value = this.serializeReference(mirror.localValue(i));
-    x[i] = local;
-  }
-  content.locals = x;
-  serializeLocationFields(mirror.sourceLocation(), content);
-  var source_line_text = mirror.sourceLineText();
-  if (!IS_UNDEFINED(source_line_text)) {
-    content.sourceLineText = source_line_text;
-  }
-  
-  content.scopes = [];
-  for (var i = 0; i < mirror.scopeCount(); i++) {
-    var scope = mirror.scope(i);
-    content.scopes.push({
-      type: scope.scopeType(),
-      index: i
-    });
-  }
-}
-
-
-JSONProtocolSerializer.prototype.serializeScope_ = function(mirror, content) {
-  content.index = mirror.scopeIndex();
-  content.frameIndex = mirror.frameIndex();
-  content.type = mirror.scopeType();
-  content.object = this.inlineRefs_() ?
-                   this.serializeValue(mirror.scopeObject()) :
-                   this.serializeReference(mirror.scopeObject());
-}
-
-
-/**
- * Convert a number to a protocol value. For all finite numbers the number
- * itself is returned. For non finite numbers NaN, Infinite and
- * -Infinite the string representation "NaN", "Infinite" or "-Infinite"
- * (not including the quotes) is returned.
- *
- * @param {number} value The number value to convert to a protocol value.
- * @returns {number|string} Protocol value.
- */
-function NumberToJSON_(value) {
-  if (isNaN(value)) {
-    return 'NaN';
-  }
-  if (!isFinite(value)) {
-    if (value > 0) {
-      return 'Infinity';
-    } else {
-      return '-Infinity';
-    }
-  }
-  return value; 
-}