[debugger api] remove legacy JSON debug protocol.

src/debug/debug.js

Index: src/debug/debug.js
diff --git a/src/debug/debug.js b/src/debug/debug.js
index 512bedb69fbffd0788ad3ea3180695653f77c6d5..909a89e5f2a2652e5523dbb3bef386c66791cd0e 100644
--- a/src/debug/debug.js
+++ b/src/debug/debug.js
@@ -12,11 +12,8 @@ var FrameMirror = global.FrameMirror;
 var GlobalArray = global.Array;
 var GlobalRegExp = global.RegExp;
 var IsNaN = global.isNaN;
-var JSONParse = global.JSON.parse;
-var JSONStringify = global.JSON.stringify;
 var LookupMirror = global.LookupMirror;
 var MakeMirror = global.MakeMirror;
-var MakeMirrorSerializer = global.MakeMirrorSerializer;
 var MathMin = global.Math.min;
 var Mirror = global.Mirror;
 var MirrorType;
@@ -867,11 +864,6 @@ 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);
 }
@@ -913,43 +905,6 @@ BreakEvent.prototype.breakPointsHit = function() {
 };
 
 
-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 JSONStringify(ObjectToProtocolObject_(o));
-};
-
-
 function MakeExceptionEvent(break_id, exception, uncaught, promise) {
   return new ExceptionEvent(break_id, exception, uncaught, promise);
 }
@@ -1003,32 +958,6 @@ ExceptionEvent.prototype.sourceLineText = function() {
 };
 
 
-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);
 }
@@ -1050,27 +979,6 @@ CompileEvent.prototype.script = function() {
 };
 
 
-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(),
@@ -1108,1273 +1016,11 @@ 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 GlobalArray) {
-      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 JSONStringify(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 = JSONParse(json_request);
-
-      // Create an initial response.
-      response = this.createResponse(request);
-
-      if (!request.type) {
-        throw %make_error(kDebugger, 'Type not specified');
-      }
-
-      if (request.type != 'request') {
-        throw %make_error(kDebugger,
-                        "Illegal type '" + request.type + "' in request");
-      }
-
-      if (!request.command) {
-        throw %make_error(kDebugger, '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)) {
-        %_Call(handler, this, request, response);
-      } else {
-        throw %make_error(kDebugger,
-                        '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 = TO_STRING(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: ' + TO_STRING(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 action = Debug.StepAction.StepIn;
-
-    // Pull out arguments.
-    var stepaction = request.arguments.stepaction;
-
-    // Get the stepaction argument.
-    if (stepaction) {
-      if (stepaction == 'in') {
-        action = Debug.StepAction.StepIn;
-      } else if (stepaction == 'next') {
-        action = Debug.StepAction.StepNext;
-      } else if (stepaction == 'out') {
-        action = Debug.StepAction.StepOut;
-      } else {
-        throw %make_error(kDebugger,
-                        'Invalid stepaction argument "' + stepaction + '".');
-      }
-    }
-
-    // Set up the VM for stepping.
-    this.exec_state_.prepareStep(action);
-  }
-
-  // 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 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: "' + TO_STRING(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 (!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 %make_error(kDebugger,
-                      "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 = TO_NUMBER(request.arguments.breakpoint);
-  var enabled = request.arguments.enabled;
-  var condition = request.arguments.condition;
-
-  // 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);
-  }
-};
-
-
-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 = TO_NUMBER(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(),
-      active: break_point.active(),
-      condition: break_point.condition(),
-      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 %make_error(kDebugger,
-                      "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 = MathMin(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 %make_type_error(kDebuggerFrame);
-    }
-    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 %make_error(kDebugger, 'Function handle must be a number');
-    }
-    var function_mirror = LookupMirror(scope_description.functionHandle);
-    if (!function_mirror) {
-      throw %make_error(kDebugger, 'Failed to find function object by handle');
-    }
-    if (!function_mirror.isFunction()) {
-      throw %make_error(kDebugger,
-                      'Value of non-function type is found by handle');
-    }
-    return function_mirror;
-  } else {
-    // No frames no scopes.
-    if (this.exec_state_.frameCount() == 0) {
-      throw %make_error(kDebugger, '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 = TO_NUMBER(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 %make_error(kDebugger, "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 == MirrorType.BOOLEAN_TYPE) {
-      return TO_BOOLEAN(value_description.stringDescription);
-    } else if (value_description.type == MirrorType.NUMBER_TYPE) {
-      return TO_NUMBER(value_description.stringDescription);
-    } if (value_description.type == MirrorType.STRING_TYPE) {
-      return TO_STRING(value_description.stringDescription);
-    } else {
-      throw %make_error(kDebugger, "Unknown type");
-    }
-  } else if ("value" in value_description) {
-    return value_description.value;
-  } else if (value_description.type == MirrorType.UNDEFINED_TYPE) {
-    return UNDEFINED;
-  } else if (value_description.type == MirrorType.NULL_TYPE) {
-    return null;
-  } else {
-    throw %make_error(kDebugger, "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 = TO_NUMBER(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;
-
-  // The expression argument could be an integer so we convert it to a
-  // string.
-  try {
-    expression = TO_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');
-  }
-
-  // Global evaluate.
-  if (global) {
-    // Evaluate in the native context.
-    response.body = this.exec_state_.evaluateGlobal(expression);
-    return;
-  }
-
-  // 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 = TO_NUMBER(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);
-    return;
-  } else {
-    // Evaluate in the selected frame.
-    response.body = this.exec_state_.frame().evaluate(expression);
-    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 = TO_BOOLEAN(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 = TO_NUMBER(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');
-  }
-
-  var raw_script = script.value();
-
-  // Sanitize arguments and remove line offset.
-  var line_offset = raw_script.line_offset;
-  var line_count = %ScriptLineCount(raw_script);
-  from_line = IS_UNDEFINED(from_line) ? 0 : from_line - line_offset;
-  to_line = IS_UNDEFINED(to_line) ? line_count : to_line - line_offset;
-
-  if (from_line < 0) from_line = 0;
-  if (to_line > line_count) to_line = line_count;
-
-  if (from_line >= line_count || to_line < 0 || from_line > to_line) {
-    return response.failed('Invalid line interval');
-  }
-
-  // Fill in the response.
-
-  response.body = {};
-  response.body.fromLine = from_line + line_offset;
-  response.body.toLine = to_line + line_offset;
-  response.body.fromPosition = %ScriptLineStartPosition(raw_script, from_line);
-  response.body.toPosition =
-    (to_line == 0) ? 0 : %ScriptLineEndPosition(raw_script, to_line - 1);
-  response.body.totalLines = %ScriptLineCount(raw_script);
-
-  response.body.source = %_SubString(raw_script.source,
-                                     response.body.fromPosition,
-                                     response.body.toPosition);
-};
-
-
-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 = TO_NUMBER(request.arguments.types);
-      if (IsNaN(types) || types < 0) {
-        return response.failed('Invalid types "' +
-                               request.arguments.types + '"');
-      }
-    }
-
-    if (!IS_UNDEFINED(request.arguments.includeSource)) {
-      includeSource = TO_BOOLEAN(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 = TO_NUMBER(request.arguments.filter);
-      if (!IsNaN(num)) {
-        filterNum = num;
-      }
-      filterStr = request.arguments.filter;
-    }
-  }
-
-  // Collect all scripts in the heap.
-  var scripts = Debug.scripts();
-
-  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.suspendRequest_ = function(request, response) {
-  response.running = false;
-};
-
-
-// TODO(5510): remove this.
-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 the_script = scriptById(script_id);
-  if (!the_script) {
-    response.failed('Script not found');
-    return;
-  }
-
-  var change_log = new GlobalArray();
-
-  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 = TO_NUMBER(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 = frame_mirror.restart();
-  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_,
-    "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;
-}
-
-
 // -------------------------------------------------------------------
 // Exports
 
 utils.InstallConstants(global, [
   "Debug", Debug,
-  "DebugCommandProcessor", DebugCommandProcessor,
   "BreakEvent", BreakEvent,
   "CompileEvent", CompileEvent,
   "BreakPoint", BreakPoint,