Debugger: move implementation to a separate folder.

src/debug-debugger.js

-// Copyright 2012 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-"use strict";
-
-// Default number of frames to include in the response to backtrace request.
-var kDefaultBacktraceLength = 10;
-
-var Debug = {};
-
-// Regular expression to skip "crud" at the beginning of a source line which is
-// not really code. Currently the regular expression matches whitespace and
-// comments.
-var sourceLineBeginningSkip = /^(?:\s*(?:\/\*.*?\*\/)*)*/;
-
-// Debug events which can occour in the V8 JavaScript engine. These originate
-// from the API include file debug.h.
-Debug.DebugEvent = { Break: 1,
-                     Exception: 2,
-                     NewFunction: 3,
-                     BeforeCompile: 4,
-                     AfterCompile: 5,
-                     CompileError: 6,
-                     PromiseEvent: 7,
-                     AsyncTaskEvent: 8 };
-
-// Types of exceptions that can be broken upon.
-Debug.ExceptionBreak = { Caught : 0,
-                         Uncaught: 1 };
-
-// The different types of steps.
-Debug.StepAction = { StepOut: 0,
-                     StepNext: 1,
-                     StepIn: 2,
-                     StepMin: 3,
-                     StepInMin: 4,
-                     StepFrame: 5 };
-
-// The different types of scripts matching enum ScriptType in objects.h.
-Debug.ScriptType = { Native: 0,
-                     Extension: 1,
-                     Normal: 2 };
-
-// The different types of script compilations matching enum
-// Script::CompilationType in objects.h.
-Debug.ScriptCompilationType = { Host: 0,
-                                Eval: 1,
-                                JSON: 2 };
-
-// The different script break point types.
-Debug.ScriptBreakPointType = { ScriptId: 0,
-                               ScriptName: 1,
-                               ScriptRegExp: 2 };
-
-// The different types of breakpoint position alignments.
-// Must match BreakPositionAlignment in debug.h.
-Debug.BreakPositionAlignment = {
-  Statement: 0,
-  BreakPosition: 1
-};
-
-function ScriptTypeFlag(type) {
-  return (1 << type);
-}
-
-// Globals.
-var next_response_seq = 0;
-var next_break_point_number = 1;
-var break_points = [];
-var script_break_points = [];
-var debugger_flags = {
-  breakPointsActive: {
-    value: true,
-    getValue: function() { return this.value; },
-    setValue: function(value) {
-      this.value = !!value;
-      %SetDisableBreak(!this.value);
-    }
-  },
-  breakOnCaughtException: {
-    getValue: function() { return Debug.isBreakOnException(); },
-    setValue: function(value) {
-      if (value) {
-        Debug.setBreakOnException();
-      } else {
-        Debug.clearBreakOnException();
-      }
-    }
-  },
-  breakOnUncaughtException: {
-    getValue: function() { return Debug.isBreakOnUncaughtException(); },
-    setValue: function(value) {
-      if (value) {
-        Debug.setBreakOnUncaughtException();
-      } else {
-        Debug.clearBreakOnUncaughtException();
-      }
-    }
-  },
-};
-
-
-// Create a new break point object and add it to the list of break points.
-function MakeBreakPoint(source_position, opt_script_break_point) {
-  var break_point = new BreakPoint(source_position, opt_script_break_point);
-  break_points.push(break_point);
-  return break_point;
-}
-
-
-// Object representing a break point.
-// NOTE: This object does not have a reference to the function having break
-// point as this would cause function not to be garbage collected when it is
-// not used any more. We do not want break points to keep functions alive.
-function BreakPoint(source_position, opt_script_break_point) {
-  this.source_position_ = source_position;
-  if (opt_script_break_point) {
-    this.script_break_point_ = opt_script_break_point;
-  } else {
-    this.number_ = next_break_point_number++;
-  }
-  this.hit_count_ = 0;
-  this.active_ = true;
-  this.condition_ = null;
-  this.ignoreCount_ = 0;
-}
-
-
-BreakPoint.prototype.number = function() {
-  return this.number_;
-};
-
-
-BreakPoint.prototype.func = function() {
-  return this.func_;
-};
-
-
-BreakPoint.prototype.source_position = function() {
-  return this.source_position_;
-};
-
-
-BreakPoint.prototype.hit_count = function() {
-  return this.hit_count_;
-};
-
-
-BreakPoint.prototype.active = function() {
-  if (this.script_break_point()) {
-    return this.script_break_point().active();
-  }
-  return this.active_;
-};
-
-
-BreakPoint.prototype.condition = function() {
-  if (this.script_break_point() && this.script_break_point().condition()) {
-    return this.script_break_point().condition();
-  }
-  return this.condition_;
-};
-
-
-BreakPoint.prototype.ignoreCount = function() {
-  return this.ignoreCount_;
-};
-
-
-BreakPoint.prototype.script_break_point = function() {
-  return this.script_break_point_;
-};
-
-
-BreakPoint.prototype.enable = function() {
-  this.active_ = true;
-};
-
-
-BreakPoint.prototype.disable = function() {
-  this.active_ = false;
-};
-
-
-BreakPoint.prototype.setCondition = function(condition) {
-  this.condition_ = condition;
-};
-
-
-BreakPoint.prototype.setIgnoreCount = function(ignoreCount) {
-  this.ignoreCount_ = ignoreCount;
-};
-
-
-BreakPoint.prototype.isTriggered = function(exec_state) {
-  // Break point not active - not triggered.
-  if (!this.active()) return false;
-
-  // Check for conditional break point.
-  if (this.condition()) {
-    // If break point has condition try to evaluate it in the top frame.
-    try {
-      var mirror = exec_state.frame(0).evaluate(this.condition());
-      // If no sensible mirror or non true value break point not triggered.
-      if (!(mirror instanceof ValueMirror) ||
-          !builtins.$toBoolean(mirror.value_)) {
-        return false;
-      }
-    } catch (e) {
-      // Exception evaluating condition counts as not triggered.
-      return false;
-    }
-  }
-
-  // Update the hit count.
-  this.hit_count_++;
-  if (this.script_break_point_) {
-    this.script_break_point_.hit_count_++;
-  }
-
-  // If the break point has an ignore count it is not triggered.
-  if (this.ignoreCount_ > 0) {
-    this.ignoreCount_--;
-    return false;
-  }
-
-  // Break point triggered.
-  return true;
-};
-
-
-// Function called from the runtime when a break point is hit. Returns true if
-// the break point is triggered and supposed to break execution.
-function IsBreakPointTriggered(break_id, break_point) {
-  return break_point.isTriggered(MakeExecutionState(break_id));
-}
-
-
-// Object representing a script break point. The script is referenced by its
-// script name or script id and the break point is represented as line and
-// column.
-function ScriptBreakPoint(type, script_id_or_name, opt_line, opt_column,
-                          opt_groupId, opt_position_alignment) {
-  this.type_ = type;
-  if (type == Debug.ScriptBreakPointType.ScriptId) {
-    this.script_id_ = script_id_or_name;
-  } else if (type == Debug.ScriptBreakPointType.ScriptName) {
-    this.script_name_ = script_id_or_name;
-  } else if (type == Debug.ScriptBreakPointType.ScriptRegExp) {
-    this.script_regexp_object_ = new RegExp(script_id_or_name);
-  } else {
-    throw new Error("Unexpected breakpoint type " + type);
-  }
-  this.line_ = opt_line || 0;
-  this.column_ = opt_column;
-  this.groupId_ = opt_groupId;
-  this.position_alignment_ = IS_UNDEFINED(opt_position_alignment)
-      ? Debug.BreakPositionAlignment.Statement : opt_position_alignment;
-  this.hit_count_ = 0;
-  this.active_ = true;
-  this.condition_ = null;
-  this.ignoreCount_ = 0;
-  this.break_points_ = [];
-}
-
-
-// Creates a clone of script breakpoint that is linked to another script.
-ScriptBreakPoint.prototype.cloneForOtherScript = function (other_script) {
-  var copy = new ScriptBreakPoint(Debug.ScriptBreakPointType.ScriptId,
-      other_script.id, this.line_, this.column_, this.groupId_,
-      this.position_alignment_);
-  copy.number_ = next_break_point_number++;
-  script_break_points.push(copy);
-
-  copy.hit_count_ = this.hit_count_;
-  copy.active_ = this.active_;
-  copy.condition_ = this.condition_;
-  copy.ignoreCount_ = this.ignoreCount_;
-  return copy;
-};
-
-
-ScriptBreakPoint.prototype.number = function() {
-  return this.number_;
-};
-
-
-ScriptBreakPoint.prototype.groupId = function() {
-  return this.groupId_;
-};
-
-
-ScriptBreakPoint.prototype.type = function() {
-  return this.type_;
-};
-
-
-ScriptBreakPoint.prototype.script_id = function() {
-  return this.script_id_;
-};
-
-
-ScriptBreakPoint.prototype.script_name = function() {
-  return this.script_name_;
-};
-
-
-ScriptBreakPoint.prototype.script_regexp_object = function() {
-  return this.script_regexp_object_;
-};
-
-
-ScriptBreakPoint.prototype.line = function() {
-  return this.line_;
-};
-
-
-ScriptBreakPoint.prototype.column = function() {
-  return this.column_;
-};
-
-
-ScriptBreakPoint.prototype.actual_locations = function() {
-  var locations = [];
-  for (var i = 0; i < this.break_points_.length; i++) {
-    locations.push(this.break_points_[i].actual_location);
-  }
-  return locations;
-};
-
-
-ScriptBreakPoint.prototype.update_positions = function(line, column) {
-  this.line_ = line;
-  this.column_ = column;
-};
-
-
-ScriptBreakPoint.prototype.hit_count = function() {
-  return this.hit_count_;
-};
-
-
-ScriptBreakPoint.prototype.active = function() {
-  return this.active_;
-};
-
-
-ScriptBreakPoint.prototype.condition = function() {
-  return this.condition_;
-};
-
-
-ScriptBreakPoint.prototype.ignoreCount = function() {
-  return this.ignoreCount_;
-};
-
-
-ScriptBreakPoint.prototype.enable = function() {
-  this.active_ = true;
-};
-
-
-ScriptBreakPoint.prototype.disable = function() {
-  this.active_ = false;
-};
-
-
-ScriptBreakPoint.prototype.setCondition = function(condition) {
-  this.condition_ = condition;
-};
-
-
-ScriptBreakPoint.prototype.setIgnoreCount = function(ignoreCount) {
-  this.ignoreCount_ = ignoreCount;
-
-  // Set ignore count on all break points created from this script break point.
-  for (var i = 0; i < this.break_points_.length; i++) {
-    this.break_points_[i].setIgnoreCount(ignoreCount);
-  }
-};
-
-
-// Check whether a script matches this script break point. Currently this is
-// only based on script name.
-ScriptBreakPoint.prototype.matchesScript = function(script) {
-  if (this.type_ == Debug.ScriptBreakPointType.ScriptId) {
-    return this.script_id_ == script.id;
-  } else {
-    // We might want to account columns here as well.
-    if (!(script.line_offset <= this.line_  &&
-          this.line_ < script.line_offset + script.lineCount())) {
-      return false;
-    }
-    if (this.type_ == Debug.ScriptBreakPointType.ScriptName) {
-      return this.script_name_ == script.nameOrSourceURL();
-    } else if (this.type_ == Debug.ScriptBreakPointType.ScriptRegExp) {
-      return this.script_regexp_object_.test(script.nameOrSourceURL());
-    } else {
-      throw new Error("Unexpected breakpoint type " + this.type_);
-    }
-  }
-};
-
-
-// Set the script break point in a script.
-ScriptBreakPoint.prototype.set = function (script) {
-  var column = this.column();
-  var line = this.line();
-  // If the column is undefined the break is on the line. To help locate the
-  // first piece of breakable code on the line try to find the column on the
-  // line which contains some source.
-  if (IS_UNDEFINED(column)) {
-    var source_line = script.sourceLine(this.line());
-
-    // Allocate array for caching the columns where the actual source starts.
-    if (!script.sourceColumnStart_) {
-      script.sourceColumnStart_ = new Array(script.lineCount());
-    }
-
-    // Fill cache if needed and get column where the actual source starts.
-    if (IS_UNDEFINED(script.sourceColumnStart_[line])) {
-      script.sourceColumnStart_[line] =
-          source_line.match(sourceLineBeginningSkip)[0].length;
-    }
-    column = script.sourceColumnStart_[line];
-  }
-
-  // Convert the line and column into an absolute position within the script.
-  var position = Debug.findScriptSourcePosition(script, this.line(), column);
-
-  // If the position is not found in the script (the script might be shorter
-  // than it used to be) just ignore it.
-  if (IS_NULL(position)) return;
-
-  // Create a break point object and set the break point.
-  var break_point = MakeBreakPoint(position, this);
-  break_point.setIgnoreCount(this.ignoreCount());
-  var actual_position = %SetScriptBreakPoint(script, position,
-                                             this.position_alignment_,
-                                             break_point);
-  if (IS_UNDEFINED(actual_position)) {
-    actual_position = position;
-  }
-  var actual_location = script.locationFromPosition(actual_position, true);
-  break_point.actual_location = { line: actual_location.line,
-                                  column: actual_location.column,
-                                  script_id: script.id };
-  this.break_points_.push(break_point);
-  return break_point;
-};
-
-
-// Clear all the break points created from this script break point
-ScriptBreakPoint.prototype.clear = function () {
-  var remaining_break_points = [];
-  for (var i = 0; i < break_points.length; i++) {
-    if (break_points[i].script_break_point() &&
-        break_points[i].script_break_point() === this) {
-      %ClearBreakPoint(break_points[i]);
-    } else {
-      remaining_break_points.push(break_points[i]);
-    }
-  }
-  break_points = remaining_break_points;
-  this.break_points_ = [];
-};
-
-
-// Function called from runtime when a new script is compiled to set any script
-// break points set in this script.
-function UpdateScriptBreakPoints(script) {
-  for (var i = 0; i < script_break_points.length; i++) {
-    var break_point = script_break_points[i];
-    if ((break_point.type() == Debug.ScriptBreakPointType.ScriptName ||
-         break_point.type() == Debug.ScriptBreakPointType.ScriptRegExp) &&
-        break_point.matchesScript(script)) {
-      break_point.set(script);
-    }
-  }
-}
-
-
-function GetScriptBreakPoints(script) {
-  var result = [];
-  for (var i = 0; i < script_break_points.length; i++) {
-    if (script_break_points[i].matchesScript(script)) {
-      result.push(script_break_points[i]);
-    }
-  }
-  return result;
-}
-
-
-Debug.setListener = function(listener, opt_data) {
-  if (!IS_FUNCTION(listener) && !IS_UNDEFINED(listener) && !IS_NULL(listener)) {
-    throw new Error('Parameters have wrong types.');
-  }
-  %SetDebugEventListener(listener, opt_data);
-};
-
-
-Debug.breakLocations = function(f, opt_position_aligment) {
-  if (!IS_FUNCTION(f)) throw new Error('Parameters have wrong types.');
-  var position_aligment = IS_UNDEFINED(opt_position_aligment)
-      ? Debug.BreakPositionAlignment.Statement : opt_position_aligment;
-  return %GetBreakLocations(f, position_aligment);
-};
-
-// Returns a Script object. If the parameter is a function the return value
-// is the script in which the function is defined. If the parameter is a string
-// the return value is the script for which the script name has that string
-// value.  If it is a regexp and there is a unique script whose name matches
-// we return that, otherwise undefined.
-Debug.findScript = function(func_or_script_name) {
-  if (IS_FUNCTION(func_or_script_name)) {
-    return %FunctionGetScript(func_or_script_name);
-  } else if (IS_REGEXP(func_or_script_name)) {
-    var scripts = Debug.scripts();
-    var last_result = null;
-    var result_count = 0;
-    for (var i in scripts) {
-      var script = scripts[i];
-      if (func_or_script_name.test(script.name)) {
-        last_result = script;
-        result_count++;
-      }
-    }
-    // Return the unique script matching the regexp.  If there are more
-    // than one we don't return a value since there is no good way to
-    // decide which one to return.  Returning a "random" one, say the
-    // first, would introduce nondeterminism (or something close to it)
-    // because the order is the heap iteration order.
-    if (result_count == 1) {
-      return last_result;
-    } else {
-      return undefined;
-    }
-  } else {
-    return %GetScript(func_or_script_name);
-  }
-};
-
-// Returns the script source. If the parameter is a function the return value
-// is the script source for the script in which the function is defined. If the
-// parameter is a string the return value is the script for which the script
-// name has that string value.
-Debug.scriptSource = function(func_or_script_name) {
-  return this.findScript(func_or_script_name).source;
-};
-
-
-Debug.source = function(f) {
-  if (!IS_FUNCTION(f)) throw new Error('Parameters have wrong types.');
-  return %FunctionGetSourceCode(f);
-};
-
-
-Debug.sourcePosition = function(f) {
-  if (!IS_FUNCTION(f)) throw new Error('Parameters have wrong types.');
-  return %FunctionGetScriptSourcePosition(f);
-};
-
-
-Debug.findFunctionSourceLocation = function(func, opt_line, opt_column) {
-  var script = %FunctionGetScript(func);
-  var script_offset = %FunctionGetScriptSourcePosition(func);
-  return script.locationFromLine(opt_line, opt_column, script_offset);
-};
-
-
-// Returns the character position in a script based on a line number and an
-// optional position within that line.
-Debug.findScriptSourcePosition = function(script, opt_line, opt_column) {
-  var location = script.locationFromLine(opt_line, opt_column);
-  return location ? location.position : null;
-};
-
-
-Debug.findBreakPoint = function(break_point_number, remove) {
-  var break_point;
-  for (var i = 0; i < break_points.length; i++) {
-    if (break_points[i].number() == break_point_number) {
-      break_point = break_points[i];
-      // Remove the break point from the list if requested.
-      if (remove) {
-        break_points.splice(i, 1);
-      }
-      break;
-    }
-  }
-  if (break_point) {
-    return break_point;
-  } else {
-    return this.findScriptBreakPoint(break_point_number, remove);
-  }
-};
-
-Debug.findBreakPointActualLocations = function(break_point_number) {
-  for (var i = 0; i < script_break_points.length; i++) {
-    if (script_break_points[i].number() == break_point_number) {
-      return script_break_points[i].actual_locations();
-    }
-  }
-  for (var i = 0; i < break_points.length; i++) {
-    if (break_points[i].number() == break_point_number) {
-      return [break_points[i].actual_location];
-    }
-  }
-  return [];
-};
-
-Debug.setBreakPoint = function(func, opt_line, opt_column, opt_condition) {
-  if (!IS_FUNCTION(func)) throw new Error('Parameters have wrong types.');
-  // Break points in API functions are not supported.
-  if (%FunctionIsAPIFunction(func)) {
-    throw new Error('Cannot set break point in native code.');
-  }
-  // Find source position relative to start of the function
-  var break_position =
-      this.findFunctionSourceLocation(func, opt_line, opt_column).position;
-  var source_position = break_position - this.sourcePosition(func);
-  // Find the script for the function.
-  var script = %FunctionGetScript(func);
-  // Break in builtin JavaScript code is not supported.
-  if (script.type == Debug.ScriptType.Native) {
-    throw new Error('Cannot set break point in native code.');
-  }
-  // If the script for the function has a name convert this to a script break
-  // point.
-  if (script && script.id) {
-    // Adjust the source position to be script relative.
-    source_position += %FunctionGetScriptSourcePosition(func);
-    // Find line and column for the position in the script and set a script
-    // break point from that.
-    var location = script.locationFromPosition(source_position, false);
-    return this.setScriptBreakPointById(script.id,
-                                        location.line, location.column,
-                                        opt_condition);
-  } else {
-    // Set a break point directly on the function.
-    var break_point = MakeBreakPoint(source_position);
-    var actual_position =
-        %SetFunctionBreakPoint(func, source_position, break_point);
-    actual_position += this.sourcePosition(func);
-    var actual_location = script.locationFromPosition(actual_position, true);
-    break_point.actual_location = { line: actual_location.line,
-                                    column: actual_location.column,
-                                    script_id: script.id };
-    break_point.setCondition(opt_condition);
-    return break_point.number();
-  }
-};
-
-
-Debug.setBreakPointByScriptIdAndPosition = function(script_id, position,
-                                                    condition, enabled,
-                                                    opt_position_alignment)
-{
-  var break_point = MakeBreakPoint(position);
-  break_point.setCondition(condition);
-  if (!enabled) {
-    break_point.disable();
-  }
-  var scripts = this.scripts();
-  var position_alignment = IS_UNDEFINED(opt_position_alignment)
-      ? Debug.BreakPositionAlignment.Statement : opt_position_alignment;
-  for (var i = 0; i < scripts.length; i++) {
-    if (script_id == scripts[i].id) {
-      break_point.actual_position = %SetScriptBreakPoint(scripts[i], position,
-          position_alignment, break_point);
-      break;
-    }
-  }
-  return break_point;
-};
-
-
-Debug.enableBreakPoint = function(break_point_number) {
-  var break_point = this.findBreakPoint(break_point_number, false);
-  // Only enable if the breakpoint hasn't been deleted:
-  if (break_point) {
-    break_point.enable();
-  }
-};
-
-
-Debug.disableBreakPoint = function(break_point_number) {
-  var break_point = this.findBreakPoint(break_point_number, false);
-  // Only enable if the breakpoint hasn't been deleted:
-  if (break_point) {
-    break_point.disable();
-  }
-};
-
-
-Debug.changeBreakPointCondition = function(break_point_number, condition) {
-  var break_point = this.findBreakPoint(break_point_number, false);
-  break_point.setCondition(condition);
-};
-
-
-Debug.changeBreakPointIgnoreCount = function(break_point_number, ignoreCount) {
-  if (ignoreCount < 0) {
-    throw new Error('Invalid argument');
-  }
-  var break_point = this.findBreakPoint(break_point_number, false);
-  break_point.setIgnoreCount(ignoreCount);
-};
-
-
-Debug.clearBreakPoint = function(break_point_number) {
-  var break_point = this.findBreakPoint(break_point_number, true);
-  if (break_point) {
-    return %ClearBreakPoint(break_point);
-  } else {
-    break_point = this.findScriptBreakPoint(break_point_number, true);
-    if (!break_point) {
-      throw new Error('Invalid breakpoint');
-    }
-  }
-};
-
-
-Debug.clearAllBreakPoints = function() {
-  for (var i = 0; i < break_points.length; i++) {
-    var break_point = break_points[i];
-    %ClearBreakPoint(break_point);
-  }
-  break_points = [];
-};
-
-
-Debug.disableAllBreakPoints = function() {
-  // Disable all user defined breakpoints:
-  for (var i = 1; i < next_break_point_number; i++) {
-    Debug.disableBreakPoint(i);
-  }
-  // Disable all exception breakpoints:
-  %ChangeBreakOnException(Debug.ExceptionBreak.Caught, false);
-  %ChangeBreakOnException(Debug.ExceptionBreak.Uncaught, false);
-};
-
-
-Debug.findScriptBreakPoint = function(break_point_number, remove) {
-  var script_break_point;
-  for (var i = 0; i < script_break_points.length; i++) {
-    if (script_break_points[i].number() == break_point_number) {
-      script_break_point = script_break_points[i];
-      // Remove the break point from the list if requested.
-      if (remove) {
-        script_break_point.clear();
-        script_break_points.splice(i,1);
-      }
-      break;
-    }
-  }
-  return script_break_point;
-};
-
-
-// Sets a breakpoint in a script identified through id or name at the
-// specified source line and column within that line.
-Debug.setScriptBreakPoint = function(type, script_id_or_name,
-                                     opt_line, opt_column, opt_condition,
-                                     opt_groupId, opt_position_alignment) {
-  // Create script break point object.
-  var script_break_point =
-      new ScriptBreakPoint(type, script_id_or_name, opt_line, opt_column,
-                           opt_groupId, opt_position_alignment);
-
-  // Assign number to the new script break point and add it.
-  script_break_point.number_ = next_break_point_number++;
-  script_break_point.setCondition(opt_condition);
-  script_break_points.push(script_break_point);
-
-  // Run through all scripts to see if this script break point matches any
-  // loaded scripts.
-  var scripts = this.scripts();
-  for (var i = 0; i < scripts.length; i++) {
-    if (script_break_point.matchesScript(scripts[i])) {
-      script_break_point.set(scripts[i]);
-    }
-  }
-
-  return script_break_point.number();
-};
-
-
-Debug.setScriptBreakPointById = function(script_id,
-                                         opt_line, opt_column,
-                                         opt_condition, opt_groupId,
-                                         opt_position_alignment) {
-  return this.setScriptBreakPoint(Debug.ScriptBreakPointType.ScriptId,
-                                  script_id, opt_line, opt_column,
-                                  opt_condition, opt_groupId,
-                                  opt_position_alignment);
-};
-
-
-Debug.setScriptBreakPointByName = function(script_name,
-                                           opt_line, opt_column,
-                                           opt_condition, opt_groupId) {
-  return this.setScriptBreakPoint(Debug.ScriptBreakPointType.ScriptName,
-                                  script_name, opt_line, opt_column,
-                                  opt_condition, opt_groupId);
-};
-
-
-Debug.setScriptBreakPointByRegExp = function(script_regexp,
-                                             opt_line, opt_column,
-                                             opt_condition, opt_groupId) {
-  return this.setScriptBreakPoint(Debug.ScriptBreakPointType.ScriptRegExp,
-                                  script_regexp, opt_line, opt_column,
-                                  opt_condition, opt_groupId);
-};
-
-
-Debug.enableScriptBreakPoint = function(break_point_number) {
-  var script_break_point = this.findScriptBreakPoint(break_point_number, false);
-  script_break_point.enable();
-};
-
-
-Debug.disableScriptBreakPoint = function(break_point_number) {
-  var script_break_point = this.findScriptBreakPoint(break_point_number, false);
-  script_break_point.disable();
-};
-
-
-Debug.changeScriptBreakPointCondition = function(
-    break_point_number, condition) {
-  var script_break_point = this.findScriptBreakPoint(break_point_number, false);
-  script_break_point.setCondition(condition);
-};
-
-
-Debug.changeScriptBreakPointIgnoreCount = function(
-    break_point_number, ignoreCount) {
-  if (ignoreCount < 0) {
-    throw new Error('Invalid argument');
-  }
-  var script_break_point = this.findScriptBreakPoint(break_point_number, false);
-  script_break_point.setIgnoreCount(ignoreCount);
-};
-
-
-Debug.scriptBreakPoints = function() {
-  return script_break_points;
-};
-
-
-Debug.clearStepping = function() {
-  %ClearStepping();
-};
-
-Debug.setBreakOnException = function() {
-  return %ChangeBreakOnException(Debug.ExceptionBreak.Caught, true);
-};
-
-Debug.clearBreakOnException = function() {
-  return %ChangeBreakOnException(Debug.ExceptionBreak.Caught, false);
-};
-
-Debug.isBreakOnException = function() {
-  return !!%IsBreakOnException(Debug.ExceptionBreak.Caught);
-};
-
-Debug.setBreakOnUncaughtException = function() {
-  return %ChangeBreakOnException(Debug.ExceptionBreak.Uncaught, true);
-};
-
-Debug.clearBreakOnUncaughtException = function() {
-  return %ChangeBreakOnException(Debug.ExceptionBreak.Uncaught, false);
-};
-
-Debug.isBreakOnUncaughtException = function() {
-  return !!%IsBreakOnException(Debug.ExceptionBreak.Uncaught);
-};
-
-Debug.showBreakPoints = function(f, full, opt_position_alignment) {
-  if (!IS_FUNCTION(f)) throw new Error('Parameters have wrong types.');
-  var source = full ? this.scriptSource(f) : this.source(f);
-  var offset = full ? this.sourcePosition(f) : 0;
-  var locations = this.breakLocations(f, opt_position_alignment);
-  if (!locations) return source;
-  locations.sort(function(x, y) { return x - y; });
-  var result = "";
-  var prev_pos = 0;
-  var pos;
-  for (var i = 0; i < locations.length; i++) {
-    pos = locations[i] - offset;
-    result += source.slice(prev_pos, pos);
-    result += "[B" + i + "]";
-    prev_pos = pos;
-  }
-  pos = source.length;
-  result += source.substring(prev_pos, pos);
-  return result;
-};
-
-
-// Get all the scripts currently loaded. Locating all the scripts is based on
-// scanning the heap.
-Debug.scripts = function() {
-  // Collect all scripts in the heap.
-  return %DebugGetLoadedScripts();
-};
-
-
-Debug.debuggerFlags = function() {
-  return debugger_flags;
-};
-
-Debug.MakeMirror = MakeMirror;
-
-function MakeExecutionState(break_id) {
-  return new ExecutionState(break_id);
-}
-
-function ExecutionState(break_id) {
-  this.break_id = break_id;
-  this.selected_frame = 0;
-}
-
-ExecutionState.prototype.prepareStep = function(opt_action, opt_count,
-    opt_callframe) {
-  var action = Debug.StepAction.StepIn;
-  if (!IS_UNDEFINED(opt_action)) action = builtins.$toNumber(opt_action);
-  var count = opt_count ? builtins.$toNumber(opt_count) : 1;
-  var callFrameId = 0;
-  if (!IS_UNDEFINED(opt_callframe)) {
-    callFrameId = opt_callframe.details_.frameId();
-  }
-
-  return %PrepareStep(this.break_id, action, count, callFrameId);
-};
-
-ExecutionState.prototype.evaluateGlobal = function(source, disable_break,
-    opt_additional_context) {
-  return MakeMirror(%DebugEvaluateGlobal(this.break_id, source,
-                                         Boolean(disable_break),
-                                         opt_additional_context));
-};
-
-ExecutionState.prototype.frameCount = function() {
-  return %GetFrameCount(this.break_id);
-};
-
-ExecutionState.prototype.threadCount = function() {
-  return %GetThreadCount(this.break_id);
-};
-
-ExecutionState.prototype.frame = function(opt_index) {
-  // If no index supplied return the selected frame.
-  if (opt_index == null) opt_index = this.selected_frame;
-  if (opt_index < 0 || opt_index >= this.frameCount()) {
-    throw new Error('Illegal frame index.');
-  }
-  return new FrameMirror(this.break_id, opt_index);
-};
-
-ExecutionState.prototype.setSelectedFrame = function(index) {
-  var i = builtins.$toNumber(index);
-  if (i < 0 || i >= this.frameCount()) throw new Error('Illegal frame index.');
-  this.selected_frame = i;
-};
-
-ExecutionState.prototype.selectedFrame = function() {
-  return this.selected_frame;
-};
-
-ExecutionState.prototype.debugCommandProcessor = function(opt_is_running) {
-  return new DebugCommandProcessor(this, opt_is_running);
-};
-
-
-function MakeBreakEvent(break_id, break_points_hit) {
-  return new BreakEvent(break_id, break_points_hit);
-}
-
-
-function BreakEvent(break_id, break_points_hit) {
-  this.frame_ = new FrameMirror(break_id, 0);
-  this.break_points_hit_ = break_points_hit;
-}
-
-
-BreakEvent.prototype.eventType = function() {
-  return Debug.DebugEvent.Break;
-};
-
-
-BreakEvent.prototype.func = function() {
-  return this.frame_.func();
-};
-
-
-BreakEvent.prototype.sourceLine = function() {
-  return this.frame_.sourceLine();
-};
-
-
-BreakEvent.prototype.sourceColumn = function() {
-  return this.frame_.sourceColumn();
-};
-
-
-BreakEvent.prototype.sourceLineText = function() {
-  return this.frame_.sourceLineText();
-};
-
-
-BreakEvent.prototype.breakPointsHit = function() {
-  return this.break_points_hit_;
-};
-
-
-BreakEvent.prototype.toJSONProtocol = function() {
-  var o = { seq: next_response_seq++,
-            type: "event",
-            event: "break",
-            body: { invocationText: this.frame_.invocationText() }
-          };
-
-  // Add script related information to the event if available.
-  var script = this.func().script();
-  if (script) {
-    o.body.sourceLine = this.sourceLine(),
-    o.body.sourceColumn = this.sourceColumn(),
-    o.body.sourceLineText = this.sourceLineText(),
-    o.body.script = MakeScriptObject_(script, false);
-  }
-
-  // Add an Array of break points hit if any.
-  if (this.breakPointsHit()) {
-    o.body.breakpoints = [];
-    for (var i = 0; i < this.breakPointsHit().length; i++) {
-      // Find the break point number. For break points originating from a
-      // script break point supply the script break point number.
-      var breakpoint = this.breakPointsHit()[i];
-      var script_break_point = breakpoint.script_break_point();
-      var number;
-      if (script_break_point) {
-        number = script_break_point.number();
-      } else {
-        number = breakpoint.number();
-      }
-      o.body.breakpoints.push(number);
-    }
-  }
-  return JSON.stringify(ObjectToProtocolObject_(o));
-};
-
-
-function MakeExceptionEvent(break_id, exception, uncaught, promise) {
-  return new ExceptionEvent(break_id, exception, uncaught, promise);
-}
-
-
-function ExceptionEvent(break_id, exception, uncaught, promise) {
-  this.exec_state_ = new ExecutionState(break_id);
-  this.exception_ = exception;
-  this.uncaught_ = uncaught;
-  this.promise_ = promise;
-}
-
-
-ExceptionEvent.prototype.eventType = function() {
-  return Debug.DebugEvent.Exception;
-};
-
-
-ExceptionEvent.prototype.exception = function() {
-  return this.exception_;
-};
-
-
-ExceptionEvent.prototype.uncaught = function() {
-  return this.uncaught_;
-};
-
-
-ExceptionEvent.prototype.promise = function() {
-  return this.promise_;
-};
-
-
-ExceptionEvent.prototype.func = function() {
-  return this.exec_state_.frame(0).func();
-};
-
-
-ExceptionEvent.prototype.sourceLine = function() {
-  return this.exec_state_.frame(0).sourceLine();
-};
-
-
-ExceptionEvent.prototype.sourceColumn = function() {
-  return this.exec_state_.frame(0).sourceColumn();
-};
-
-
-ExceptionEvent.prototype.sourceLineText = function() {
-  return this.exec_state_.frame(0).sourceLineText();
-};
-
-
-ExceptionEvent.prototype.toJSONProtocol = function() {
-  var o = new ProtocolMessage();
-  o.event = "exception";
-  o.body = { uncaught: this.uncaught_,
-             exception: MakeMirror(this.exception_)
-           };
-
-  // Exceptions might happen whithout any JavaScript frames.
-  if (this.exec_state_.frameCount() > 0) {
-    o.body.sourceLine = this.sourceLine();
-    o.body.sourceColumn = this.sourceColumn();
-    o.body.sourceLineText = this.sourceLineText();
-
-    // Add script information to the event if available.
-    var script = this.func().script();
-    if (script) {
-      o.body.script = MakeScriptObject_(script, false);
-    }
-  } else {
-    o.body.sourceLine = -1;
-  }
-
-  return o.toJSONProtocol();
-};
-
-
-function MakeCompileEvent(script, type) {
-  return new CompileEvent(script, type);
-}
-
-
-function CompileEvent(script, type) {
-  this.script_ = MakeMirror(script);
-  this.type_ = type;
-}
-
-
-CompileEvent.prototype.eventType = function() {
-  return this.type_;
-};
-
-
-CompileEvent.prototype.script = function() {
-  return this.script_;
-};
-
-
-CompileEvent.prototype.toJSONProtocol = function() {
-  var o = new ProtocolMessage();
-  o.running = true;
-  switch (this.type_) {
-    case Debug.DebugEvent.BeforeCompile:
-      o.event = "beforeCompile";
-      break;
-    case Debug.DebugEvent.AfterCompile:
-      o.event = "afterCompile";
-      break;
-    case Debug.DebugEvent.CompileError:
-      o.event = "compileError";
-      break;
-  }
-  o.body = {};
-  o.body.script = this.script_;
-
-  return o.toJSONProtocol();
-};
-
-
-function MakeScriptObject_(script, include_source) {
-  var o = { id: script.id(),
-            name: script.name(),
-            lineOffset: script.lineOffset(),
-            columnOffset: script.columnOffset(),
-            lineCount: script.lineCount(),
-          };
-  if (!IS_UNDEFINED(script.data())) {
-    o.data = script.data();
-  }
-  if (include_source) {
-    o.source = script.source();
-  }
-  return o;
-}
-
-
-function MakePromiseEvent(event_data) {
-  return new PromiseEvent(event_data);
-}
-
-
-function PromiseEvent(event_data) {
-  this.promise_ = event_data.promise;
-  this.parentPromise_ = event_data.parentPromise;
-  this.status_ = event_data.status;
-  this.value_ = event_data.value;
-}
-
-
-PromiseEvent.prototype.promise = function() {
-  return MakeMirror(this.promise_);
-}
-
-
-PromiseEvent.prototype.parentPromise = function() {
-  return MakeMirror(this.parentPromise_);
-}
-
-
-PromiseEvent.prototype.status = function() {
-  return this.status_;
-}
-
-
-PromiseEvent.prototype.value = function() {
-  return MakeMirror(this.value_);
-}
-
-
-function MakeAsyncTaskEvent(event_data) {
-  return new AsyncTaskEvent(event_data);
-}
-
-
-function AsyncTaskEvent(event_data) {
-  this.type_ = event_data.type;
-  this.name_ = event_data.name;
-  this.id_ = event_data.id;
-}
-
-
-AsyncTaskEvent.prototype.type = function() {
-  return this.type_;
-}
-
-
-AsyncTaskEvent.prototype.name = function() {
-  return this.name_;
-}
-
-
-AsyncTaskEvent.prototype.id = function() {
-  return this.id_;
-}
-
-
-function DebugCommandProcessor(exec_state, opt_is_running) {
-  this.exec_state_ = exec_state;
-  this.running_ = opt_is_running || false;
-}
-
-
-DebugCommandProcessor.prototype.processDebugRequest = function (request) {
-  return this.processDebugJSONRequest(request);
-};
-
-
-function ProtocolMessage(request) {
-  // Update sequence number.
-  this.seq = next_response_seq++;
-
-  if (request) {
-    // If message is based on a request this is a response. Fill the initial
-    // response from the request.
-    this.type = 'response';
-    this.request_seq = request.seq;
-    this.command = request.command;
-  } else {
-    // If message is not based on a request it is a dabugger generated event.
-    this.type = 'event';
-  }
-  this.success = true;
-  // Handler may set this field to control debugger state.
-  this.running = undefined;
-}
-
-
-ProtocolMessage.prototype.setOption = function(name, value) {
-  if (!this.options_) {
-    this.options_ = {};
-  }
-  this.options_[name] = value;
-};
-
-
-ProtocolMessage.prototype.failed = function(message, opt_details) {
-  this.success = false;
-  this.message = message;
-  if (IS_OBJECT(opt_details)) {
-    this.error_details = opt_details;
-  }
-};
-
-
-ProtocolMessage.prototype.toJSONProtocol = function() {
-  // Encode the protocol header.
-  var json = {};
-  json.seq= this.seq;
-  if (this.request_seq) {
-    json.request_seq = this.request_seq;
-  }
-  json.type = this.type;
-  if (this.event) {
-    json.event = this.event;
-  }
-  if (this.command) {
-    json.command = this.command;
-  }
-  if (this.success) {
-    json.success = this.success;
-  } else {
-    json.success = false;
-  }
-  if (this.body) {
-    // Encode the body part.
-    var bodyJson;
-    var serializer = MakeMirrorSerializer(true, this.options_);
-    if (this.body instanceof Mirror) {
-      bodyJson = serializer.serializeValue(this.body);
-    } else if (this.body instanceof Array) {
-      bodyJson = [];
-      for (var i = 0; i < this.body.length; i++) {
-        if (this.body[i] instanceof Mirror) {
-          bodyJson.push(serializer.serializeValue(this.body[i]));
-        } else {
-          bodyJson.push(ObjectToProtocolObject_(this.body[i], serializer));
-        }
-      }
-    } else {
-      bodyJson = ObjectToProtocolObject_(this.body, serializer);
-    }
-    json.body = bodyJson;
-    json.refs = serializer.serializeReferencedObjects();
-  }
-  if (this.message) {
-    json.message = this.message;
-  }
-  if (this.error_details) {
-    json.error_details = this.error_details;
-  }
-  json.running = this.running;
-  return JSON.stringify(json);
-};
-
-
-DebugCommandProcessor.prototype.createResponse = function(request) {
-  return new ProtocolMessage(request);
-};
-
-
-DebugCommandProcessor.prototype.processDebugJSONRequest = function(
-    json_request) {
-  var request;  // Current request.
-  var response;  // Generated response.
-  try {
-    try {
-      // Convert the JSON string to an object.
-      request = JSON.parse(json_request);
-
-      // Create an initial response.
-      response = this.createResponse(request);
-
-      if (!request.type) {
-        throw new Error('Type not specified');
-      }
-
-      if (request.type != 'request') {
-        throw new Error("Illegal type '" + request.type + "' in request");
-      }
-
-      if (!request.command) {
-        throw new Error('Command not specified');
-      }
-
-      if (request.arguments) {
-        var args = request.arguments;
-        // TODO(yurys): remove request.arguments.compactFormat check once
-        // ChromeDevTools are switched to 'inlineRefs'
-        if (args.inlineRefs || args.compactFormat) {
-          response.setOption('inlineRefs', true);
-        }
-        if (!IS_UNDEFINED(args.maxStringLength)) {
-          response.setOption('maxStringLength', args.maxStringLength);
-        }
-      }
-
-      var key = request.command.toLowerCase();
-      var handler = DebugCommandProcessor.prototype.dispatch_[key];
-      if (IS_FUNCTION(handler)) {
-        %_CallFunction(this, request, response, handler);
-      } else {
-        throw new Error('Unknown command "' + request.command + '" in request');
-      }
-    } catch (e) {
-      // If there is no response object created one (without command).
-      if (!response) {
-        response = this.createResponse();
-      }
-      response.success = false;
-      response.message = builtins.$toString(e);
-    }
-
-    // Return the response as a JSON encoded string.
-    try {
-      if (!IS_UNDEFINED(response.running)) {
-        // Response controls running state.
-        this.running_ = response.running;
-      }
-      response.running = this.running_;
-      return response.toJSONProtocol();
-    } catch (e) {
-      // Failed to generate response - return generic error.
-      return '{"seq":' + response.seq + ',' +
-              '"request_seq":' + request.seq + ',' +
-              '"type":"response",' +
-              '"success":false,' +
-              '"message":"Internal error: ' + builtins.$toString(e) + '"}';
-    }
-  } catch (e) {
-    // Failed in one of the catch blocks above - most generic error.
-    return '{"seq":0,"type":"response","success":false,"message":"Internal error"}';
-  }
-};
-
-
-DebugCommandProcessor.prototype.continueRequest_ = function(request, response) {
-  // Check for arguments for continue.
-  if (request.arguments) {
-    var count = 1;
-    var action = Debug.StepAction.StepIn;
-
-    // Pull out arguments.
-    var stepaction = request.arguments.stepaction;
-    var stepcount = request.arguments.stepcount;
-
-    // Get the stepcount argument if any.
-    if (stepcount) {
-      count = builtins.$toNumber(stepcount);
-      if (count < 0) {
-        throw new Error('Invalid stepcount argument "' + stepcount + '".');
-      }
-    }
-
-    // Get the stepaction argument.
-    if (stepaction) {
-      if (stepaction == 'in') {
-        action = Debug.StepAction.StepIn;
-      } else if (stepaction == 'min') {
-        action = Debug.StepAction.StepMin;
-      } else if (stepaction == 'next') {
-        action = Debug.StepAction.StepNext;
-      } else if (stepaction == 'out') {
-        action = Debug.StepAction.StepOut;
-      } else {
-        throw new Error('Invalid stepaction argument "' + stepaction + '".');
-      }
-    }
-
-    // Set up the VM for stepping.
-    this.exec_state_.prepareStep(action, count);
-  }
-
-  // VM should be running after executing this request.
-  response.running = true;
-};
-
-
-DebugCommandProcessor.prototype.breakRequest_ = function(request, response) {
-  // Ignore as break command does not do anything when broken.
-};
-
-
-DebugCommandProcessor.prototype.setBreakPointRequest_ =
-    function(request, response) {
-  // Check for legal request.
-  if (!request.arguments) {
-    response.failed('Missing arguments');
-    return;
-  }
-
-  // Pull out arguments.
-  var type = request.arguments.type;
-  var target = request.arguments.target;
-  var line = request.arguments.line;
-  var column = request.arguments.column;
-  var enabled = IS_UNDEFINED(request.arguments.enabled) ?
-      true : request.arguments.enabled;
-  var condition = request.arguments.condition;
-  var ignoreCount = request.arguments.ignoreCount;
-  var groupId = request.arguments.groupId;
-
-  // Check for legal arguments.
-  if (!type || IS_UNDEFINED(target)) {
-    response.failed('Missing argument "type" or "target"');
-    return;
-  }
-
-  // Either function or script break point.
-  var break_point_number;
-  if (type == 'function') {
-    // Handle function break point.
-    if (!IS_STRING(target)) {
-      response.failed('Argument "target" is not a string value');
-      return;
-    }
-    var f;
-    try {
-      // Find the function through a global evaluate.
-      f = this.exec_state_.evaluateGlobal(target).value();
-    } catch (e) {
-      response.failed('Error: "' + builtins.$toString(e) +
-                      '" evaluating "' + target + '"');
-      return;
-    }
-    if (!IS_FUNCTION(f)) {
-      response.failed('"' + target + '" does not evaluate to a function');
-      return;
-    }
-
-    // Set function break point.
-    break_point_number = Debug.setBreakPoint(f, line, column, condition);
-  } else if (type == 'handle') {
-    // Find the object pointed by the specified handle.
-    var handle = parseInt(target, 10);
-    var mirror = LookupMirror(handle);
-    if (!mirror) {
-      return response.failed('Object #' + handle + '# not found');
-    }
-    if (!mirror.isFunction()) {
-      return response.failed('Object #' + handle + '# is not a function');
-    }
-
-    // Set function break point.
-    break_point_number = Debug.setBreakPoint(mirror.value(),
-                                             line, column, condition);
-  } else if (type == 'script') {
-    // set script break point.
-    break_point_number =
-        Debug.setScriptBreakPointByName(target, line, column, condition,
-                                        groupId);
-  } else if (type == 'scriptId') {
-    break_point_number =
-        Debug.setScriptBreakPointById(target, line, column, condition, groupId);
-  } else if (type == 'scriptRegExp') {
-    break_point_number =
-        Debug.setScriptBreakPointByRegExp(target, line, column, condition,
-                                          groupId);
-  } else {
-    response.failed('Illegal type "' + type + '"');
-    return;
-  }
-
-  // Set additional break point properties.
-  var break_point = Debug.findBreakPoint(break_point_number);
-  if (ignoreCount) {
-    Debug.changeBreakPointIgnoreCount(break_point_number, ignoreCount);
-  }
-  if (!enabled) {
-    Debug.disableBreakPoint(break_point_number);
-  }
-
-  // Add the break point number to the response.
-  response.body = { type: type,
-                    breakpoint: break_point_number };
-
-  // Add break point information to the response.
-  if (break_point instanceof ScriptBreakPoint) {
-    if (break_point.type() == Debug.ScriptBreakPointType.ScriptId) {
-      response.body.type = 'scriptId';
-      response.body.script_id = break_point.script_id();
-    } else if (break_point.type() == Debug.ScriptBreakPointType.ScriptName) {
-      response.body.type = 'scriptName';
-      response.body.script_name = break_point.script_name();
-    } else if (break_point.type() == Debug.ScriptBreakPointType.ScriptRegExp) {
-      response.body.type = 'scriptRegExp';
-      response.body.script_regexp = break_point.script_regexp_object().source;
-    } else {
-      throw new Error("Internal error: Unexpected breakpoint type: " +
-                      break_point.type());
-    }
-    response.body.line = break_point.line();
-    response.body.column = break_point.column();
-    response.body.actual_locations = break_point.actual_locations();
-  } else {
-    response.body.type = 'function';
-    response.body.actual_locations = [break_point.actual_location];
-  }
-};
-
-
-DebugCommandProcessor.prototype.changeBreakPointRequest_ = function(
-    request, response) {
-  // Check for legal request.
-  if (!request.arguments) {
-    response.failed('Missing arguments');
-    return;
-  }
-
-  // Pull out arguments.
-  var break_point = builtins.$toNumber(request.arguments.breakpoint);
-  var enabled = request.arguments.enabled;
-  var condition = request.arguments.condition;
-  var ignoreCount = request.arguments.ignoreCount;
-
-  // Check for legal arguments.
-  if (!break_point) {
-    response.failed('Missing argument "breakpoint"');
-    return;
-  }
-
-  // Change enabled state if supplied.
-  if (!IS_UNDEFINED(enabled)) {
-    if (enabled) {
-      Debug.enableBreakPoint(break_point);
-    } else {
-      Debug.disableBreakPoint(break_point);
-    }
-  }
-
-  // Change condition if supplied
-  if (!IS_UNDEFINED(condition)) {
-    Debug.changeBreakPointCondition(break_point, condition);
-  }
-
-  // Change ignore count if supplied
-  if (!IS_UNDEFINED(ignoreCount)) {
-    Debug.changeBreakPointIgnoreCount(break_point, ignoreCount);
-  }
-};
-
-
-DebugCommandProcessor.prototype.clearBreakPointGroupRequest_ = function(
-    request, response) {
-  // Check for legal request.
-  if (!request.arguments) {
-    response.failed('Missing arguments');
-    return;
-  }
-
-  // Pull out arguments.
-  var group_id = request.arguments.groupId;
-
-  // Check for legal arguments.
-  if (!group_id) {
-    response.failed('Missing argument "groupId"');
-    return;
-  }
-
-  var cleared_break_points = [];
-  var new_script_break_points = [];
-  for (var i = 0; i < script_break_points.length; i++) {
-    var next_break_point = script_break_points[i];
-    if (next_break_point.groupId() == group_id) {
-      cleared_break_points.push(next_break_point.number());
-      next_break_point.clear();
-    } else {
-      new_script_break_points.push(next_break_point);
-    }
-  }
-  script_break_points = new_script_break_points;
-
-  // Add the cleared break point numbers to the response.
-  response.body = { breakpoints: cleared_break_points };
-};
-
-
-DebugCommandProcessor.prototype.clearBreakPointRequest_ = function(
-    request, response) {
-  // Check for legal request.
-  if (!request.arguments) {
-    response.failed('Missing arguments');
-    return;
-  }
-
-  // Pull out arguments.
-  var break_point = builtins.$toNumber(request.arguments.breakpoint);
-
-  // Check for legal arguments.
-  if (!break_point) {
-    response.failed('Missing argument "breakpoint"');
-    return;
-  }
-
-  // Clear break point.
-  Debug.clearBreakPoint(break_point);
-
-  // Add the cleared break point number to the response.
-  response.body = { breakpoint: break_point };
-};
-
-
-DebugCommandProcessor.prototype.listBreakpointsRequest_ = function(
-    request, response) {
-  var array = [];
-  for (var i = 0; i < script_break_points.length; i++) {
-    var break_point = script_break_points[i];
-
-    var description = {
-      number: break_point.number(),
-      line: break_point.line(),
-      column: break_point.column(),
-      groupId: break_point.groupId(),
-      hit_count: break_point.hit_count(),
-      active: break_point.active(),
-      condition: break_point.condition(),
-      ignoreCount: break_point.ignoreCount(),
-      actual_locations: break_point.actual_locations()
-    };
-
-    if (break_point.type() == Debug.ScriptBreakPointType.ScriptId) {
-      description.type = 'scriptId';
-      description.script_id = break_point.script_id();
-    } else if (break_point.type() == Debug.ScriptBreakPointType.ScriptName) {
-      description.type = 'scriptName';
-      description.script_name = break_point.script_name();
-    } else if (break_point.type() == Debug.ScriptBreakPointType.ScriptRegExp) {
-      description.type = 'scriptRegExp';
-      description.script_regexp = break_point.script_regexp_object().source;
-    } else {
-      throw new Error("Internal error: Unexpected breakpoint type: " +
-                      break_point.type());
-    }
-    array.push(description);
-  }
-
-  response.body = {
-    breakpoints: array,
-    breakOnExceptions: Debug.isBreakOnException(),
-    breakOnUncaughtExceptions: Debug.isBreakOnUncaughtException()
-  };
-};
-
-
-DebugCommandProcessor.prototype.disconnectRequest_ =
-    function(request, response) {
-  Debug.disableAllBreakPoints();
-  this.continueRequest_(request, response);
-};
-
-
-DebugCommandProcessor.prototype.setExceptionBreakRequest_ =
-    function(request, response) {
-  // Check for legal request.
-  if (!request.arguments) {
-    response.failed('Missing arguments');
-    return;
-  }
-
-  // Pull out and check the 'type' argument:
-  var type = request.arguments.type;
-  if (!type) {
-    response.failed('Missing argument "type"');
-    return;
-  }
-
-  // Initialize the default value of enable:
-  var enabled;
-  if (type == 'all') {
-    enabled = !Debug.isBreakOnException();
-  } else if (type == 'uncaught') {
-    enabled = !Debug.isBreakOnUncaughtException();
-  }
-
-  // Pull out and check the 'enabled' argument if present:
-  if (!IS_UNDEFINED(request.arguments.enabled)) {
-    enabled = request.arguments.enabled;
-    if ((enabled != true) && (enabled != false)) {
-      response.failed('Illegal value for "enabled":"' + enabled + '"');
-    }
-  }
-
-  // Now set the exception break state:
-  if (type == 'all') {
-    %ChangeBreakOnException(Debug.ExceptionBreak.Caught, enabled);
-  } else if (type == 'uncaught') {
-    %ChangeBreakOnException(Debug.ExceptionBreak.Uncaught, enabled);
-  } else {
-    response.failed('Unknown "type":"' + type + '"');
-  }
-
-  // Add the cleared break point number to the response.
-  response.body = { 'type': type, 'enabled': enabled };
-};
-
-
-DebugCommandProcessor.prototype.backtraceRequest_ = function(
-    request, response) {
-  // Get the number of frames.
-  var total_frames = this.exec_state_.frameCount();
-
-  // Create simple response if there are no frames.
-  if (total_frames == 0) {
-    response.body = {
-      totalFrames: total_frames
-    };
-    return;
-  }
-
-  // Default frame range to include in backtrace.
-  var from_index = 0;
-  var to_index = kDefaultBacktraceLength;
-
-  // Get the range from the arguments.
-  if (request.arguments) {
-    if (request.arguments.fromFrame) {
-      from_index = request.arguments.fromFrame;
-    }
-    if (request.arguments.toFrame) {
-      to_index = request.arguments.toFrame;
-    }
-    if (request.arguments.bottom) {
-      var tmp_index = total_frames - from_index;
-      from_index = total_frames - to_index;
-      to_index = tmp_index;
-    }
-    if (from_index < 0 || to_index < 0) {
-      return response.failed('Invalid frame number');
-    }
-  }
-
-  // Adjust the index.
-  to_index = Math.min(total_frames, to_index);
-
-  if (to_index <= from_index) {
-    var error = 'Invalid frame range';
-    return response.failed(error);
-  }
-
-  // Create the response body.
-  var frames = [];
-  for (var i = from_index; i < to_index; i++) {
-    frames.push(this.exec_state_.frame(i));
-  }
-  response.body = {
-    fromFrame: from_index,
-    toFrame: to_index,
-    totalFrames: total_frames,
-    frames: frames
-  };
-};
-
-
-DebugCommandProcessor.prototype.frameRequest_ = function(request, response) {
-  // No frames no source.
-  if (this.exec_state_.frameCount() == 0) {
-    return response.failed('No frames');
-  }
-
-  // With no arguments just keep the selected frame.
-  if (request.arguments) {
-    var index = request.arguments.number;
-    if (index < 0 || this.exec_state_.frameCount() <= index) {
-      return response.failed('Invalid frame number');
-    }
-
-    this.exec_state_.setSelectedFrame(request.arguments.number);
-  }
-  response.body = this.exec_state_.frame();
-};
-
-
-DebugCommandProcessor.prototype.resolveFrameFromScopeDescription_ =
-    function(scope_description) {
-  // Get the frame for which the scope or scopes are requested.
-  // With no frameNumber argument use the currently selected frame.
-  if (scope_description && !IS_UNDEFINED(scope_description.frameNumber)) {
-    var frame_index = scope_description.frameNumber;
-    if (frame_index < 0 || this.exec_state_.frameCount() <= frame_index) {
-      throw new Error('Invalid frame number');
-    }
-    return this.exec_state_.frame(frame_index);
-  } else {
-    return this.exec_state_.frame();
-  }
-};
-
-
-// Gets scope host object from request. It is either a function
-// ('functionHandle' argument must be specified) or a stack frame
-// ('frameNumber' may be specified and the current frame is taken by default).
-DebugCommandProcessor.prototype.resolveScopeHolder_ =
-    function(scope_description) {
-  if (scope_description && "functionHandle" in scope_description) {
-    if (!IS_NUMBER(scope_description.functionHandle)) {
-      throw new Error('Function handle must be a number');
-    }
-    var function_mirror = LookupMirror(scope_description.functionHandle);
-    if (!function_mirror) {
-      throw new Error('Failed to find function object by handle');
-    }
-    if (!function_mirror.isFunction()) {
-      throw new Error('Value of non-function type is found by handle');
-    }
-    return function_mirror;
-  } else {
-    // No frames no scopes.
-    if (this.exec_state_.frameCount() == 0) {
-      throw new Error('No scopes');
-    }
-
-    // Get the frame for which the scopes are requested.
-    var frame = this.resolveFrameFromScopeDescription_(scope_description);
-    return frame;
-  }
-}
-
-
-DebugCommandProcessor.prototype.scopesRequest_ = function(request, response) {
-  var scope_holder = this.resolveScopeHolder_(request.arguments);
-
-  // Fill all scopes for this frame or function.
-  var total_scopes = scope_holder.scopeCount();
-  var scopes = [];
-  for (var i = 0; i < total_scopes; i++) {
-    scopes.push(scope_holder.scope(i));
-  }
-  response.body = {
-    fromScope: 0,
-    toScope: total_scopes,
-    totalScopes: total_scopes,
-    scopes: scopes
-  };
-};
-
-
-DebugCommandProcessor.prototype.scopeRequest_ = function(request, response) {
-  // Get the frame or function for which the scope is requested.
-  var scope_holder = this.resolveScopeHolder_(request.arguments);
-
-  // With no scope argument just return top scope.
-  var scope_index = 0;
-  if (request.arguments && !IS_UNDEFINED(request.arguments.number)) {
-    scope_index = builtins.$toNumber(request.arguments.number);
-    if (scope_index < 0 || scope_holder.scopeCount() <= scope_index) {
-      return response.failed('Invalid scope number');
-    }
-  }
-
-  response.body = scope_holder.scope(scope_index);
-};
-
-
-// Reads value from protocol description. Description may be in form of type
-// (for singletons), raw value (primitive types supported in JSON),
-// string value description plus type (for primitive values) or handle id.
-// Returns raw value or throws exception.
-DebugCommandProcessor.resolveValue_ = function(value_description) {
-  if ("handle" in value_description) {
-    var value_mirror = LookupMirror(value_description.handle);
-    if (!value_mirror) {
-      throw new Error("Failed to resolve value by handle, ' #" +
-          value_description.handle + "# not found");
-    }
-    return value_mirror.value();
-  } else if ("stringDescription" in value_description) {
-    if (value_description.type == BOOLEAN_TYPE) {
-      return Boolean(value_description.stringDescription);
-    } else if (value_description.type == NUMBER_TYPE) {
-      return Number(value_description.stringDescription);
-    } if (value_description.type == STRING_TYPE) {
-      return String(value_description.stringDescription);
-    } else {
-      throw new Error("Unknown type");
-    }
-  } else if ("value" in value_description) {
-    return value_description.value;
-  } else if (value_description.type == UNDEFINED_TYPE) {
-    return UNDEFINED;
-  } else if (value_description.type == NULL_TYPE) {
-    return null;
-  } else {
-    throw new Error("Failed to parse value description");
-  }
-};
-
-
-DebugCommandProcessor.prototype.setVariableValueRequest_ =
-    function(request, response) {
-  if (!request.arguments) {
-    response.failed('Missing arguments');
-    return;
-  }
-
-  if (IS_UNDEFINED(request.arguments.name)) {
-    response.failed('Missing variable name');
-  }
-  var variable_name = request.arguments.name;
-
-  var scope_description = request.arguments.scope;
-
-  // Get the frame or function for which the scope is requested.
-  var scope_holder = this.resolveScopeHolder_(scope_description);
-
-  if (IS_UNDEFINED(scope_description.number)) {
-    response.failed('Missing scope number');
-  }
-  var scope_index = builtins.$toNumber(scope_description.number);
-
-  var scope = scope_holder.scope(scope_index);
-
-  var new_value =
-      DebugCommandProcessor.resolveValue_(request.arguments.newValue);
-
-  scope.setVariableValue(variable_name, new_value);
-
-  var new_value_mirror = MakeMirror(new_value);
-
-  response.body = {
-    newValue: new_value_mirror
-  };
-};
-
-
-DebugCommandProcessor.prototype.evaluateRequest_ = function(request, response) {
-  if (!request.arguments) {
-    return response.failed('Missing arguments');
-  }
-
-  // Pull out arguments.
-  var expression = request.arguments.expression;
-  var frame = request.arguments.frame;
-  var global = request.arguments.global;
-  var disable_break = request.arguments.disable_break;
-  var additional_context = request.arguments.additional_context;
-
-  // The expression argument could be an integer so we convert it to a
-  // string.
-  try {
-    expression = String(expression);
-  } catch(e) {
-    return response.failed('Failed to convert expression argument to string');
-  }
-
-  // Check for legal arguments.
-  if (!IS_UNDEFINED(frame) && global) {
-    return response.failed('Arguments "frame" and "global" are exclusive');
-  }
-
-  var additional_context_object;
-  if (additional_context) {
-    additional_context_object = {};
-    for (var i = 0; i < additional_context.length; i++) {
-      var mapping = additional_context[i];
-
-      if (!IS_STRING(mapping.name)) {
-        return response.failed("Context element #" + i +
-            " doesn't contain name:string property");
-      }
-
-      var raw_value = DebugCommandProcessor.resolveValue_(mapping);
-      additional_context_object[mapping.name] = raw_value;
-    }
-  }
-
-  // Global evaluate.
-  if (global) {
-    // Evaluate in the native context.
-    response.body = this.exec_state_.evaluateGlobal(
-        expression, Boolean(disable_break), additional_context_object);
-    return;
-  }
-
-  // Default value for disable_break is true.
-  if (IS_UNDEFINED(disable_break)) {
-    disable_break = true;
-  }
-
-  // No frames no evaluate in frame.
-  if (this.exec_state_.frameCount() == 0) {
-    return response.failed('No frames');
-  }
-
-  // Check whether a frame was specified.
-  if (!IS_UNDEFINED(frame)) {
-    var frame_number = builtins.$toNumber(frame);
-    if (frame_number < 0 || frame_number >= this.exec_state_.frameCount()) {
-      return response.failed('Invalid frame "' + frame + '"');
-    }
-    // Evaluate in the specified frame.
-    response.body = this.exec_state_.frame(frame_number).evaluate(
-        expression, Boolean(disable_break), additional_context_object);
-    return;
-  } else {
-    // Evaluate in the selected frame.
-    response.body = this.exec_state_.frame().evaluate(
-        expression, Boolean(disable_break), additional_context_object);
-    return;
-  }
-};
-
-
-DebugCommandProcessor.prototype.lookupRequest_ = function(request, response) {
-  if (!request.arguments) {
-    return response.failed('Missing arguments');
-  }
-
-  // Pull out arguments.
-  var handles = request.arguments.handles;
-
-  // Check for legal arguments.
-  if (IS_UNDEFINED(handles)) {
-    return response.failed('Argument "handles" missing');
-  }
-
-  // Set 'includeSource' option for script lookup.
-  if (!IS_UNDEFINED(request.arguments.includeSource)) {
-    var includeSource = builtins.$toBoolean(request.arguments.includeSource);
-    response.setOption('includeSource', includeSource);
-  }
-
-  // Lookup handles.
-  var mirrors = {};
-  for (var i = 0; i < handles.length; i++) {
-    var handle = handles[i];
-    var mirror = LookupMirror(handle);
-    if (!mirror) {
-      return response.failed('Object #' + handle + '# not found');
-    }
-    mirrors[handle] = mirror;
-  }
-  response.body = mirrors;
-};
-
-
-DebugCommandProcessor.prototype.referencesRequest_ =
-    function(request, response) {
-  if (!request.arguments) {
-    return response.failed('Missing arguments');
-  }
-
-  // Pull out arguments.
-  var type = request.arguments.type;
-  var handle = request.arguments.handle;
-
-  // Check for legal arguments.
-  if (IS_UNDEFINED(type)) {
-    return response.failed('Argument "type" missing');
-  }
-  if (IS_UNDEFINED(handle)) {
-    return response.failed('Argument "handle" missing');
-  }
-  if (type != 'referencedBy' && type != 'constructedBy') {
-    return response.failed('Invalid type "' + type + '"');
-  }
-
-  // Lookup handle and return objects with references the object.
-  var mirror = LookupMirror(handle);
-  if (mirror) {
-    if (type == 'referencedBy') {
-      response.body = mirror.referencedBy();
-    } else {
-      response.body = mirror.constructedBy();
-    }
-  } else {
-    return response.failed('Object #' + handle + '# not found');
-  }
-};
-
-
-DebugCommandProcessor.prototype.sourceRequest_ = function(request, response) {
-  // No frames no source.
-  if (this.exec_state_.frameCount() == 0) {
-    return response.failed('No source');
-  }
-
-  var from_line;
-  var to_line;
-  var frame = this.exec_state_.frame();
-  if (request.arguments) {
-    // Pull out arguments.
-    from_line = request.arguments.fromLine;
-    to_line = request.arguments.toLine;
-
-    if (!IS_UNDEFINED(request.arguments.frame)) {
-      var frame_number = builtins.$toNumber(request.arguments.frame);
-      if (frame_number < 0 || frame_number >= this.exec_state_.frameCount()) {
-        return response.failed('Invalid frame "' + frame + '"');
-      }
-      frame = this.exec_state_.frame(frame_number);
-    }
-  }
-
-  // Get the script selected.
-  var script = frame.func().script();
-  if (!script) {
-    return response.failed('No source');
-  }
-
-  // Get the source slice and fill it into the response.
-  var slice = script.sourceSlice(from_line, to_line);
-  if (!slice) {
-    return response.failed('Invalid line interval');
-  }
-  response.body = {};
-  response.body.source = slice.sourceText();
-  response.body.fromLine = slice.from_line;
-  response.body.toLine = slice.to_line;
-  response.body.fromPosition = slice.from_position;
-  response.body.toPosition = slice.to_position;
-  response.body.totalLines = script.lineCount();
-};
-
-
-DebugCommandProcessor.prototype.scriptsRequest_ = function(request, response) {
-  var types = ScriptTypeFlag(Debug.ScriptType.Normal);
-  var includeSource = false;
-  var idsToInclude = null;
-  if (request.arguments) {
-    // Pull out arguments.
-    if (!IS_UNDEFINED(request.arguments.types)) {
-      types = builtins.$toNumber(request.arguments.types);
-      if (isNaN(types) || types < 0) {
-        return response.failed('Invalid types "' +
-                               request.arguments.types + '"');
-      }
-    }
-
-    if (!IS_UNDEFINED(request.arguments.includeSource)) {
-      includeSource = builtins.$toBoolean(request.arguments.includeSource);
-      response.setOption('includeSource', includeSource);
-    }
-
-    if (IS_ARRAY(request.arguments.ids)) {
-      idsToInclude = {};
-      var ids = request.arguments.ids;
-      for (var i = 0; i < ids.length; i++) {
-        idsToInclude[ids[i]] = true;
-      }
-    }
-
-    var filterStr = null;
-    var filterNum = null;
-    if (!IS_UNDEFINED(request.arguments.filter)) {
-      var num = builtins.$toNumber(request.arguments.filter);
-      if (!isNaN(num)) {
-        filterNum = num;
-      }
-      filterStr = request.arguments.filter;
-    }
-  }
-
-  // Collect all scripts in the heap.
-  var scripts = %DebugGetLoadedScripts();
-
-  response.body = [];
-
-  for (var i = 0; i < scripts.length; i++) {
-    if (idsToInclude && !idsToInclude[scripts[i].id]) {
-      continue;
-    }
-    if (filterStr || filterNum) {
-      var script = scripts[i];
-      var found = false;
-      if (filterNum && !found) {
-        if (script.id && script.id === filterNum) {
-          found = true;
-        }
-      }
-      if (filterStr && !found) {
-        if (script.name && script.name.indexOf(filterStr) >= 0) {
-          found = true;
-        }
-      }
-      if (!found) continue;
-    }
-    if (types & ScriptTypeFlag(scripts[i].type)) {
-      response.body.push(MakeMirror(scripts[i]));
-    }
-  }
-};
-
-
-DebugCommandProcessor.prototype.threadsRequest_ = function(request, response) {
-  // Get the number of threads.
-  var total_threads = this.exec_state_.threadCount();
-
-  // Get information for all threads.
-  var threads = [];
-  for (var i = 0; i < total_threads; i++) {
-    var details = %GetThreadDetails(this.exec_state_.break_id, i);
-    var thread_info = { current: details[0],
-                        id: details[1]
-                      };
-    threads.push(thread_info);
-  }
-
-  // Create the response body.
-  response.body = {
-    totalThreads: total_threads,
-    threads: threads
-  };
-};
-
-
-DebugCommandProcessor.prototype.suspendRequest_ = function(request, response) {
-  response.running = false;
-};
-
-
-DebugCommandProcessor.prototype.versionRequest_ = function(request, response) {
-  response.body = {
-    V8Version: %GetV8Version()
-  };
-};
-
-
-DebugCommandProcessor.prototype.changeLiveRequest_ = function(
-    request, response) {
-  if (!request.arguments) {
-    return response.failed('Missing arguments');
-  }
-  var script_id = request.arguments.script_id;
-  var preview_only = !!request.arguments.preview_only;
-
-  var scripts = %DebugGetLoadedScripts();
-
-  var the_script = null;
-  for (var i = 0; i < scripts.length; i++) {
-    if (scripts[i].id == script_id) {
-      the_script = scripts[i];
-    }
-  }
-  if (!the_script) {
-    response.failed('Script not found');
-    return;
-  }
-
-  var change_log = new Array();
-
-  if (!IS_STRING(request.arguments.new_source)) {
-    throw "new_source argument expected";
-  }
-
-  var new_source = request.arguments.new_source;
-
-  var result_description;
-  try {
-    result_description = Debug.LiveEdit.SetScriptSource(the_script,
-        new_source, preview_only, change_log);
-  } catch (e) {
-    if (e instanceof Debug.LiveEdit.Failure && "details" in e) {
-      response.failed(e.message, e.details);
-      return;
-    }
-    throw e;
-  }
-  response.body = {change_log: change_log, result: result_description};
-
-  if (!preview_only && !this.running_ && result_description.stack_modified) {
-    response.body.stepin_recommended = true;
-  }
-};
-
-
-DebugCommandProcessor.prototype.restartFrameRequest_ = function(
-    request, response) {
-  if (!request.arguments) {
-    return response.failed('Missing arguments');
-  }
-  var frame = request.arguments.frame;
-
-  // No frames to evaluate in frame.
-  if (this.exec_state_.frameCount() == 0) {
-    return response.failed('No frames');
-  }
-
-  var frame_mirror;
-  // Check whether a frame was specified.
-  if (!IS_UNDEFINED(frame)) {
-    var frame_number = builtins.$toNumber(frame);
-    if (frame_number < 0 || frame_number >= this.exec_state_.frameCount()) {
-      return response.failed('Invalid frame "' + frame + '"');
-    }
-    // Restart specified frame.
-    frame_mirror = this.exec_state_.frame(frame_number);
-  } else {
-    // Restart selected frame.
-    frame_mirror = this.exec_state_.frame();
-  }
-
-  var result_description = Debug.LiveEdit.RestartFrame(frame_mirror);
-  response.body = {result: result_description};
-};
-
-
-DebugCommandProcessor.prototype.debuggerFlagsRequest_ = function(request,
-                                                                 response) {
-  // Check for legal request.
-  if (!request.arguments) {
-    response.failed('Missing arguments');
-    return;
-  }
-
-  // Pull out arguments.
-  var flags = request.arguments.flags;
-
-  response.body = { flags: [] };
-  if (!IS_UNDEFINED(flags)) {
-    for (var i = 0; i < flags.length; i++) {
-      var name = flags[i].name;
-      var debugger_flag = debugger_flags[name];
-      if (!debugger_flag) {
-        continue;
-      }
-      if ('value' in flags[i]) {
-        debugger_flag.setValue(flags[i].value);
-      }
-      response.body.flags.push({ name: name, value: debugger_flag.getValue() });
-    }
-  } else {
-    for (var name in debugger_flags) {
-      var value = debugger_flags[name].getValue();
-      response.body.flags.push({ name: name, value: value });
-    }
-  }
-};
-
-
-DebugCommandProcessor.prototype.v8FlagsRequest_ = function(request, response) {
-  var flags = request.arguments.flags;
-  if (!flags) flags = '';
-  %SetFlags(flags);
-};
-
-
-DebugCommandProcessor.prototype.gcRequest_ = function(request, response) {
-  var type = request.arguments.type;
-  if (!type) type = 'all';
-
-  var before = %GetHeapUsage();
-  %CollectGarbage(type);
-  var after = %GetHeapUsage();
-
-  response.body = { "before": before, "after": after };
-};
-
-
-DebugCommandProcessor.prototype.dispatch_ = (function() {
-  var proto = DebugCommandProcessor.prototype;
-  return {
-    "continue":             proto.continueRequest_,
-    "break"   :             proto.breakRequest_,
-    "setbreakpoint" :       proto.setBreakPointRequest_,
-    "changebreakpoint":     proto.changeBreakPointRequest_,
-    "clearbreakpoint":      proto.clearBreakPointRequest_,
-    "clearbreakpointgroup": proto.clearBreakPointGroupRequest_,
-    "disconnect":           proto.disconnectRequest_,
-    "setexceptionbreak":    proto.setExceptionBreakRequest_,
-    "listbreakpoints":      proto.listBreakpointsRequest_,
-    "backtrace":            proto.backtraceRequest_,
-    "frame":                proto.frameRequest_,
-    "scopes":               proto.scopesRequest_,
-    "scope":                proto.scopeRequest_,
-    "setvariablevalue":     proto.setVariableValueRequest_,
-    "evaluate":             proto.evaluateRequest_,
-    "lookup":               proto.lookupRequest_,
-    "references":           proto.referencesRequest_,
-    "source":               proto.sourceRequest_,
-    "scripts":              proto.scriptsRequest_,
-    "threads":              proto.threadsRequest_,
-    "suspend":              proto.suspendRequest_,
-    "version":              proto.versionRequest_,
-    "changelive":           proto.changeLiveRequest_,
-    "restartframe":         proto.restartFrameRequest_,
-    "flags":                proto.debuggerFlagsRequest_,
-    "v8flag":               proto.v8FlagsRequest_,
-    "gc":                   proto.gcRequest_,
-  };
-})();
-
-
-// Check whether the previously processed command caused the VM to become
-// running.
-DebugCommandProcessor.prototype.isRunning = function() {
-  return this.running_;
-};
-
-
-DebugCommandProcessor.prototype.systemBreak = function(cmd, args) {
-  return %SystemBreak();
-};
-
-
-/**
- * Convert an Object to its debugger protocol representation. The representation
- * may be serilized to a JSON object using JSON.stringify().
- * This implementation simply runs through all string property names, converts
- * each property value to a protocol value and adds the property to the result
- * object. For type "object" the function will be called recursively. Note that
- * circular structures will cause infinite recursion.
- * @param {Object} object The object to format as protocol object.
- * @param {MirrorSerializer} mirror_serializer The serializer to use if any
- *     mirror objects are encountered.
- * @return {Object} Protocol object value.
- */
-function ObjectToProtocolObject_(object, mirror_serializer) {
-  var content = {};
-  for (var key in object) {
-    // Only consider string keys.
-    if (typeof key == 'string') {
-      // Format the value based on its type.
-      var property_value_json = ValueToProtocolValue_(object[key],
-                                                      mirror_serializer);
-      // Add the property if relevant.
-      if (!IS_UNDEFINED(property_value_json)) {
-        content[key] = property_value_json;
-      }
-    }
-  }
-
-  return content;
-}
-
-
-/**
- * Convert an array to its debugger protocol representation. It will convert
- * each array element to a protocol value.
- * @param {Array} array The array to format as protocol array.
- * @param {MirrorSerializer} mirror_serializer The serializer to use if any
- *     mirror objects are encountered.
- * @return {Array} Protocol array value.
- */
-function ArrayToProtocolArray_(array, mirror_serializer) {
-  var json = [];
-  for (var i = 0; i < array.length; i++) {
-    json.push(ValueToProtocolValue_(array[i], mirror_serializer));
-  }
-  return json;
-}
-
-
-/**
- * Convert a value to its debugger protocol representation.
- * @param {*} value The value to format as protocol value.
- * @param {MirrorSerializer} mirror_serializer The serializer to use if any
- *     mirror objects are encountered.
- * @return {*} Protocol value.
- */
-function ValueToProtocolValue_(value, mirror_serializer) {
-  // Format the value based on its type.
-  var json;
-  switch (typeof value) {
-    case 'object':
-      if (value instanceof Mirror) {
-        json = mirror_serializer.serializeValue(value);
-      } else if (IS_ARRAY(value)){
-        json = ArrayToProtocolArray_(value, mirror_serializer);
-      } else {
-        json = ObjectToProtocolObject_(value, mirror_serializer);
-      }
-      break;
-
-    case 'boolean':
-    case 'string':
-    case 'number':
-      json = value;
-      break;
-
-    default:
-      json = null;
-  }
-  return json;
-}