Initial import of the Chrome Frame codebase. Integration in chrome.gyp coming...

chrome_frame/tools/test/reference_build/chrome/resources/inspector/debugger_agent.js

Index: chrome_frame/tools/test/reference_build/chrome/resources/inspector/debugger_agent.js
===================================================================
--- chrome_frame/tools/test/reference_build/chrome/resources/inspector/debugger_agent.js	(revision 0)
+++ chrome_frame/tools/test/reference_build/chrome/resources/inspector/debugger_agent.js	(revision 0)
@@ -0,0 +1,1490 @@
+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview Provides communication interface to remote v8 debugger. See
+ * protocol decription at http://code.google.com/p/v8/wiki/DebuggerProtocol
+ */
+goog.provide('devtools.DebuggerAgent');
+
+
+/**
+ * @constructor
+ */
+devtools.DebuggerAgent = function() {
+  RemoteDebuggerAgent.DebuggerOutput =
+      goog.bind(this.handleDebuggerOutput_, this);
+  RemoteDebuggerAgent.SetContextId =
+      goog.bind(this.setContextId_, this);
+  RemoteDebuggerAgent.DidGetActiveProfilerModules =
+      goog.bind(this.didGetActiveProfilerModules_, this);
+  RemoteDebuggerAgent.DidGetNextLogLines =
+      goog.bind(this.didGetNextLogLines_, this);
+
+  /**
+   * Id of the inspected page global context. It is used for filtering scripts.
+   * @type {number}
+   */
+  this.contextId_ = null;
+
+  /**
+   * Mapping from script id to script info.
+   * @type {Object}
+   */
+  this.parsedScripts_ = null;
+
+  /**
+   * Mapping from the request id to the devtools.BreakpointInfo for the
+   * breakpoints whose v8 ids are not set yet. These breakpoints are waiting for
+   * 'setbreakpoint' responses to learn their ids in the v8 debugger.
+   * @see #handleSetBreakpointResponse_
+   * @type {Object}
+   */
+  this.requestNumberToBreakpointInfo_ = null;
+
+  /**
+   * Information on current stack frames.
+   * @type {Array.<devtools.CallFrame>}
+   */
+  this.callFrames_ = [];
+
+  /**
+   * Whether to stop in the debugger on the exceptions.
+   * @type {boolean}
+   */
+  this.pauseOnExceptions_ = true;
+
+  /**
+   * Mapping: request sequence number->callback.
+   * @type {Object}
+   */
+  this.requestSeqToCallback_ = null;
+
+  /**
+   * Whether the scripts list has been requested.
+   * @type {boolean}
+   */
+  this.scriptsCacheInitialized_ = false;
+
+  /**
+   * Whether the scripts list should be requested next time when context id is
+   * set.
+   * @type {boolean}
+   */
+  this.requestScriptsWhenContextIdSet_ = false;
+
+  /**
+   * Active profiler modules flags.
+   * @type {number}
+   */
+  this.activeProfilerModules_ =
+      devtools.DebuggerAgent.ProfilerModules.PROFILER_MODULE_NONE;
+
+  /**
+   * Profiler processor instance.
+   * @type {devtools.profiler.Processor}
+   */
+  this.profilerProcessor_ = new devtools.profiler.Processor();
+
+  /**
+   * Container of all breakpoints set using resource URL. These breakpoints
+   * survive page reload. Breakpoints set by script id(for scripts that don't
+   * have URLs) are stored in ScriptInfo objects.
+   * @type {Object}
+   */
+  this.urlToBreakpoints_ = {};
+
+
+  /**
+   * Exception message that is shown to user while on exception break.
+   * @type {WebInspector.ConsoleMessage}
+   */
+  this.currentExceptionMessage_ = null;
+};
+
+
+/**
+ * A copy of the scope types from v8/src/mirror-delay.js
+ * @enum {number}
+ */
+devtools.DebuggerAgent.ScopeType = {
+  Global: 0,
+  Local: 1,
+  With: 2,
+  Closure: 3,
+  Catch: 4
+};
+
+
+/**
+ * A copy of enum from include/v8.h
+ * @enum {number}
+ */
+devtools.DebuggerAgent.ProfilerModules = {
+  PROFILER_MODULE_NONE: 0,
+  PROFILER_MODULE_CPU: 1,
+  PROFILER_MODULE_HEAP_STATS: 1 << 1,
+  PROFILER_MODULE_JS_CONSTRUCTORS: 1 << 2,
+  PROFILER_MODULE_HEAP_SNAPSHOT: 1 << 16
+};
+
+
+/**
+ * Resets debugger agent to its initial state.
+ */
+devtools.DebuggerAgent.prototype.reset = function() {
+  this.contextId_ = null;
+  // No need to request scripts since they all will be pushed in AfterCompile
+  // events.
+  this.requestScriptsWhenContextIdSet_ = false;
+  this.parsedScripts_ = {};
+  this.requestNumberToBreakpointInfo_ = {};
+  this.callFrames_ = [];
+  this.requestSeqToCallback_ = {};
+
+  // Profiler isn't reset because it contains no data that is
+  // specific for a particular V8 instance. All such data is
+  // managed by an agent on the Render's side.
+};
+
+
+/**
+ * Initializes scripts UI. This method is called every time Scripts panel
+ * is shown. It will send request for context id if it's not set yet.
+ */
+devtools.DebuggerAgent.prototype.initUI = function() {
+  // There can be a number of scripts from after-compile events that are
+  // pending addition into the UI.
+  for (var scriptId in this.parsedScripts_) {
+    var script = this.parsedScripts_[scriptId];
+    WebInspector.parsedScriptSource(scriptId, script.getUrl(),
+        undefined /* script source */, script.getLineOffset());
+  }
+
+  // Initialize scripts cache when Scripts panel is shown first time.
+  if (this.scriptsCacheInitialized_) {
+    return;
+  }
+  this.scriptsCacheInitialized_ = true;
+  if (this.contextId_) {
+    // We already have context id. This means that we are here from the
+    // very beginning of the page load cycle and hence will get all scripts
+    // via after-compile events. No need to request scripts for this session.
+    return;
+  }
+  // Script list should be requested only when current context id is known.
+  RemoteDebuggerAgent.GetContextId();
+  this.requestScriptsWhenContextIdSet_ = true;
+};
+
+
+/**
+ * Asynchronously requests the debugger for the script source.
+ * @param {number} scriptId Id of the script whose source should be resolved.
+ * @param {function(source:?string):void} callback Function that will be called
+ *     when the source resolution is completed. 'source' parameter will be null
+ *     if the resolution fails.
+ */
+devtools.DebuggerAgent.prototype.resolveScriptSource = function(
+    scriptId, callback) {
+  var script = this.parsedScripts_[scriptId];
+  if (!script || script.isUnresolved()) {
+    callback(null);
+    return;
+  }
+
+  var cmd = new devtools.DebugCommand('scripts', {
+    'ids': [scriptId],
+    'includeSource': true
+  });
+  devtools.DebuggerAgent.sendCommand_(cmd);
+  // Force v8 execution so that it gets to processing the requested command.
+  RemoteToolsAgent.ExecuteVoidJavaScript();
+
+  this.requestSeqToCallback_[cmd.getSequenceNumber()] = function(msg) {
+    if (msg.isSuccess()) {
+      var scriptJson = msg.getBody()[0];
+      callback(scriptJson.source);
+    } else {
+      callback(null);
+    }
+  };
+};
+
+
+/**
+ * Tells the v8 debugger to stop on as soon as possible.
+ */
+devtools.DebuggerAgent.prototype.pauseExecution = function() {
+  RemoteDebuggerAgent.DebugBreak();
+};
+
+
+/**
+ * @param {number} sourceId Id of the script fot the breakpoint.
+ * @param {number} line Number of the line for the breakpoint.
+ * @param {?string} condition The breakpoint condition.
+ */
+devtools.DebuggerAgent.prototype.addBreakpoint = function(
+    sourceId, line, condition) {
+  var script = this.parsedScripts_[sourceId];
+  if (!script) {
+    return;
+  }
+
+  line = devtools.DebuggerAgent.webkitToV8LineNumber_(line);
+
+  var commandArguments;
+  if (script.getUrl()) {
+    var breakpoints = this.urlToBreakpoints_[script.getUrl()];
+    if (breakpoints && breakpoints[line]) {
+      return;
+    }
+    if (!breakpoints) {
+      breakpoints = {};
+      this.urlToBreakpoints_[script.getUrl()] = breakpoints;
+    }
+
+    var breakpointInfo = new devtools.BreakpointInfo(line);
+    breakpoints[line] = breakpointInfo;
+
+    commandArguments = {
+      'groupId': this.contextId_,
+      'type': 'script',
+      'target': script.getUrl(),
+      'line': line,
+      'condition': condition
+    };
+  } else {
+    var breakpointInfo = script.getBreakpointInfo(line);
+    if (breakpointInfo) {
+      return;
+    }
+
+    breakpointInfo = new devtools.BreakpointInfo(line);
+    script.addBreakpointInfo(breakpointInfo);
+
+    commandArguments = {
+      'groupId': this.contextId_,
+      'type': 'scriptId',
+      'target': sourceId,
+      'line': line,
+      'condition': condition
+    };
+  }
+
+  var cmd = new devtools.DebugCommand('setbreakpoint', commandArguments);
+
+  this.requestNumberToBreakpointInfo_[cmd.getSequenceNumber()] = breakpointInfo;
+
+  devtools.DebuggerAgent.sendCommand_(cmd);
+  // Force v8 execution so that it gets to processing the requested command.
+  // It is necessary for being able to change a breakpoint just after it
+  // has been created (since we need an existing breakpoint id for that).
+  RemoteToolsAgent.ExecuteVoidJavaScript();
+};
+
+
+/**
+ * @param {number} sourceId Id of the script for the breakpoint.
+ * @param {number} line Number of the line for the breakpoint.
+ */
+devtools.DebuggerAgent.prototype.removeBreakpoint = function(sourceId, line) {
+  var script = this.parsedScripts_[sourceId];
+  if (!script) {
+    return;
+  }
+
+  line = devtools.DebuggerAgent.webkitToV8LineNumber_(line);
+
+  var breakpointInfo;
+  if (script.getUrl()) {
+    var breakpoints = this.urlToBreakpoints_[script.getUrl()];
+    breakpointInfo = breakpoints[line];
+    delete breakpoints[line];
+  } else {
+    breakpointInfo = script.getBreakpointInfo(line);
+    if (breakpointInfo) {
+      script.removeBreakpointInfo(breakpointInfo);
+    }
+  }
+
+  if (!breakpointInfo) {
+    return;
+  }
+
+  breakpointInfo.markAsRemoved();
+
+  var id = breakpointInfo.getV8Id();
+
+  // If we don't know id of this breakpoint in the v8 debugger we cannot send
+  // 'clearbreakpoint' request. In that case it will be removed in
+  // 'setbreakpoint' response handler when we learn the id.
+  if (id != -1) {
+    this.requestClearBreakpoint_(id);
+  }
+};
+
+
+/**
+ * @param {number} sourceId Id of the script for the breakpoint.
+ * @param {number} line Number of the line for the breakpoint.
+ * @param {?string} condition New breakpoint condition.
+ */
+devtools.DebuggerAgent.prototype.updateBreakpoint = function(
+    sourceId, line, condition) {
+  var script = this.parsedScripts_[sourceId];
+  if (!script) {
+    return;
+  }
+
+  line = devtools.DebuggerAgent.webkitToV8LineNumber_(line);
+
+  var breakpointInfo;
+  if (script.getUrl()) {
+    var breakpoints = this.urlToBreakpoints_[script.getUrl()];
+    breakpointInfo = breakpoints[line];
+  } else {
+    breakpointInfo = script.getBreakpointInfo(line);
+  }
+
+  var id = breakpointInfo.getV8Id();
+
+  // If we don't know id of this breakpoint in the v8 debugger we cannot send
+  // the 'changebreakpoint' request.
+  if (id != -1) {
+    // TODO(apavlov): make use of the real values for 'enabled' and
+    // 'ignoreCount' when appropriate.
+    this.requestChangeBreakpoint_(id, true, condition, null);
+  }
+};
+
+
+/**
+ * Tells the v8 debugger to step into the next statement.
+ */
+devtools.DebuggerAgent.prototype.stepIntoStatement = function() {
+  this.stepCommand_('in');
+};
+
+
+/**
+ * Tells the v8 debugger to step out of current function.
+ */
+devtools.DebuggerAgent.prototype.stepOutOfFunction = function() {
+  this.stepCommand_('out');
+};
+
+
+/**
+ * Tells the v8 debugger to step over the next statement.
+ */
+devtools.DebuggerAgent.prototype.stepOverStatement = function() {
+  this.stepCommand_('next');
+};
+
+
+/**
+ * Tells the v8 debugger to continue execution after it has been stopped on a
+ * breakpoint or an exception.
+ */
+devtools.DebuggerAgent.prototype.resumeExecution = function() {
+  this.clearExceptionMessage_();
+  var cmd = new devtools.DebugCommand('continue');
+  devtools.DebuggerAgent.sendCommand_(cmd);
+};
+
+
+/**
+ * Creates exception message and schedules it for addition to the resource upon
+ * backtrace availability.
+ * @param {string} url Resource url.
+ * @param {number} line Resource line number.
+ * @param {string} message Exception text.
+ */
+devtools.DebuggerAgent.prototype.createExceptionMessage_ = function(
+    url, line, message) {
+  this.currentExceptionMessage_ = new WebInspector.ConsoleMessage(
+      WebInspector.ConsoleMessage.MessageSource.JS,
+      WebInspector.ConsoleMessage.MessageType.Log,
+      WebInspector.ConsoleMessage.MessageLevel.Error,
+      line,
+      url,
+      0 /* group level */,
+      1 /* repeat count */,
+      '[Exception] ' + message);
+};
+
+
+/**
+ * Shows pending exception message that is created with createExceptionMessage_
+ * earlier.
+ */
+devtools.DebuggerAgent.prototype.showPendingExceptionMessage_ = function() {
+  if (!this.currentExceptionMessage_) {
+    return;
+  }
+  var msg = this.currentExceptionMessage_;
+  var resource = WebInspector.resourceURLMap[msg.url];
+  if (resource) {
+    msg.resource = resource;
+    WebInspector.panels.resources.addMessageToResource(resource, msg);
+  } else {
+    this.currentExceptionMessage_ = null;
+  }
+};
+
+
+/**
+ * Clears exception message from the resource.
+ */
+devtools.DebuggerAgent.prototype.clearExceptionMessage_ = function() {
+  if (this.currentExceptionMessage_) {
+    var messageElement =
+        this.currentExceptionMessage_._resourceMessageLineElement;
+    var bubble = messageElement.parentElement;
+    bubble.removeChild(messageElement);
+    if (!bubble.firstChild) {
+      // Last message in bubble removed.
+      bubble.parentElement.removeChild(bubble);
+    }
+    this.currentExceptionMessage_ = null;
+  }
+};
+
+
+/**
+ * @return {boolean} True iff the debugger will pause execution on the
+ * exceptions.
+ */
+devtools.DebuggerAgent.prototype.pauseOnExceptions = function() {
+  return this.pauseOnExceptions_;
+};
+
+
+/**
+ * Tells whether to pause in the debugger on the exceptions or not.
+ * @param {boolean} value True iff execution should be stopped in the debugger
+ * on the exceptions.
+ */
+devtools.DebuggerAgent.prototype.setPauseOnExceptions = function(value) {
+  this.pauseOnExceptions_ = value;
+};
+
+
+/**
+ * Sends 'evaluate' request to the debugger.
+ * @param {Object} arguments Request arguments map.
+ * @param {function(devtools.DebuggerMessage)} callback Callback to be called
+ *     when response is received.
+ */
+devtools.DebuggerAgent.prototype.requestEvaluate = function(
+    arguments, callback) {
+  var cmd = new devtools.DebugCommand('evaluate', arguments);
+  devtools.DebuggerAgent.sendCommand_(cmd);
+  this.requestSeqToCallback_[cmd.getSequenceNumber()] = callback;
+};
+
+
+/**
+ * Sends 'lookup' request for each unresolved property of the object. When
+ * response is received the properties will be changed with their resolved
+ * values.
+ * @param {Object} object Object whose properties should be resolved.
+ * @param {function(devtools.DebuggerMessage)} Callback to be called when all
+ *     children are resolved.
+ * @param {boolean} noIntrinsic Whether intrinsic properties should be included.
+ */
+devtools.DebuggerAgent.prototype.resolveChildren = function(object, callback,
+                                                            noIntrinsic) {
+  if ('handle' in object) {
+    var result = [];
+    devtools.DebuggerAgent.formatObjectProperties_(object, result,
+                                                   noIntrinsic);
+    callback(result);
+  } else {
+    this.requestLookup_([object.ref], function(msg) {
+      var result = [];
+      if (msg.isSuccess()) {
+        var handleToObject = msg.getBody();
+        var resolved = handleToObject[object.ref];
+        devtools.DebuggerAgent.formatObjectProperties_(resolved, result,
+                                                       noIntrinsic);
+        callback(result);
+      } else {
+        callback([]);
+      }
+    });
+  }
+};
+
+
+/**
+ * Sends 'scope' request for the scope object to resolve its variables.
+ * @param {Object} scope Scope to be resolved.
+ * @param {function(Array.<WebInspector.ObjectPropertyProxy>)} callback
+ *     Callback to be called when all scope variables are resolved.
+ */
+devtools.DebuggerAgent.prototype.resolveScope = function(scope, callback) {
+  var cmd = new devtools.DebugCommand('scope', {
+    'frameNumber': scope.frameNumber,
+    'number': scope.index,
+    'compactFormat': true
+  });
+  devtools.DebuggerAgent.sendCommand_(cmd);
+  this.requestSeqToCallback_[cmd.getSequenceNumber()] = function(msg) {
+      var result = [];
+    if (msg.isSuccess()) {
+      var scopeObjectJson = msg.getBody().object;
+      devtools.DebuggerAgent.formatObjectProperties_(scopeObjectJson, result,
+                                                     true /* no intrinsic */);
+    }
+    callback(result);
+  };
+};
+
+
+/**
+ * Sets up callbacks that deal with profiles processing.
+ */
+devtools.DebuggerAgent.prototype.setupProfilerProcessorCallbacks = function() {
+  // A temporary icon indicating that the profile is being processed.
+  var processingIcon = new WebInspector.SidebarTreeElement(
+      'profile-sidebar-tree-item',
+      WebInspector.UIString('Processing...'),
+      '', null, false);
+  var profilesSidebar = WebInspector.panels.profiles.sidebarTree;
+
+  this.profilerProcessor_.setCallbacks(
+      function onProfileProcessingStarted() {
+        // Set visually empty string. Subtitle hiding is done via styles
+        // manipulation which doesn't play well with dynamic append / removal.
+        processingIcon.subtitle = ' ';
+        profilesSidebar.appendChild(processingIcon);
+      },
+      function onProfileProcessingStatus(ticksCount) {
+        processingIcon.subtitle =
+            WebInspector.UIString('%d ticks processed', ticksCount);
+      },
+      function onProfileProcessingFinished(profile) {
+        profilesSidebar.removeChild(processingIcon);
+        WebInspector.addProfile(profile);
+        // If no profile is currently shown, show the new one.
+        var profilesPanel = WebInspector.panels.profiles;
+        if (!profilesPanel.visibleView) {
+          profilesPanel.showProfile(profile);
+        }
+      }
+  );
+};
+
+
+/**
+ * Initializes profiling state.
+ */
+devtools.DebuggerAgent.prototype.initializeProfiling = function() {
+  this.setupProfilerProcessorCallbacks();
+  RemoteDebuggerAgent.GetActiveProfilerModules();
+};
+
+
+/**
+ * Starts profiling.
+ * @param {number} modules List of modules to enable.
+ */
+devtools.DebuggerAgent.prototype.startProfiling = function(modules) {
+  RemoteDebuggerAgent.StartProfiling(modules);
+  if (modules &
+      devtools.DebuggerAgent.ProfilerModules.PROFILER_MODULE_HEAP_SNAPSHOT) {
+    // Active modules will not change, instead, a snapshot will be logged.
+    RemoteDebuggerAgent.GetNextLogLines();
+  } else {
+    RemoteDebuggerAgent.GetActiveProfilerModules();
+  }
+};
+
+
+/**
+ * Stops profiling.
+ */
+devtools.DebuggerAgent.prototype.stopProfiling = function(modules) {
+  RemoteDebuggerAgent.StopProfiling(modules);
+};
+
+
+/**
+ * @param{number} scriptId
+ * @return {string} Type of the context of the script with specified id.
+ */
+devtools.DebuggerAgent.prototype.getScriptContextType = function(scriptId) {
+  return this.parsedScripts_[scriptId].getContextType();
+};
+
+
+/**
+ * Removes specified breakpoint from the v8 debugger.
+ * @param {number} breakpointId Id of the breakpoint in the v8 debugger.
+ */
+devtools.DebuggerAgent.prototype.requestClearBreakpoint_ = function(
+    breakpointId) {
+  var cmd = new devtools.DebugCommand('clearbreakpoint', {
+    'breakpoint': breakpointId
+  });
+  devtools.DebuggerAgent.sendCommand_(cmd);
+};
+
+
+/**
+ * Changes breakpoint parameters in the v8 debugger.
+ * @param {number} breakpointId Id of the breakpoint in the v8 debugger.
+ * @param {boolean} enabled Whether to enable the breakpoint.
+ * @param {?string} condition New breakpoint condition.
+ * @param {number} ignoreCount New ignore count for the breakpoint.
+ */
+devtools.DebuggerAgent.prototype.requestChangeBreakpoint_ = function(
+    breakpointId, enabled, condition, ignoreCount) {
+  var cmd = new devtools.DebugCommand('changebreakpoint', {
+    'breakpoint': breakpointId,
+    'enabled': enabled,
+    'condition': condition,
+    'ignoreCount': ignoreCount
+  });
+  devtools.DebuggerAgent.sendCommand_(cmd);
+};
+
+
+/**
+ * Sends 'backtrace' request to v8.
+ */
+devtools.DebuggerAgent.prototype.requestBacktrace_ = function() {
+  var cmd = new devtools.DebugCommand('backtrace', {
+    'compactFormat':true
+  });
+  devtools.DebuggerAgent.sendCommand_(cmd);
+};
+
+
+/**
+ * Sends command to v8 debugger.
+ * @param {devtools.DebugCommand} cmd Command to execute.
+ */
+devtools.DebuggerAgent.sendCommand_ = function(cmd) {
+  RemoteDebuggerCommandExecutor.DebuggerCommand(cmd.toJSONProtocol());
+};
+
+
+/**
+ * Tells the v8 debugger to make the next execution step.
+ * @param {string} action 'in', 'out' or 'next' action.
+ */
+devtools.DebuggerAgent.prototype.stepCommand_ = function(action) {
+  this.clearExceptionMessage_();
+  var cmd = new devtools.DebugCommand('continue', {
+    'stepaction': action,
+    'stepcount': 1
+  });
+  devtools.DebuggerAgent.sendCommand_(cmd);
+};
+
+
+/**
+ * Sends 'lookup' request to v8.
+ * @param {number} handle Handle to the object to lookup.
+ */
+devtools.DebuggerAgent.prototype.requestLookup_ = function(handles, callback) {
+  var cmd = new devtools.DebugCommand('lookup', {
+    'compactFormat':true,
+    'handles': handles
+  });
+  devtools.DebuggerAgent.sendCommand_(cmd);
+  this.requestSeqToCallback_[cmd.getSequenceNumber()] = callback;
+};
+
+
+/**
+ * Sets debugger context id for scripts filtering.
+ * @param {number} contextId Id of the inspected page global context.
+ */
+devtools.DebuggerAgent.prototype.setContextId_ = function(contextId) {
+  this.contextId_ = contextId;
+
+  // If it's the first time context id is set request scripts list.
+  if (this.requestScriptsWhenContextIdSet_) {
+    this.requestScriptsWhenContextIdSet_ = false;
+    var cmd = new devtools.DebugCommand('scripts', {
+      'includeSource': false
+    });
+    devtools.DebuggerAgent.sendCommand_(cmd);
+    // Force v8 execution so that it gets to processing the requested command.
+    RemoteToolsAgent.ExecuteVoidJavaScript();
+
+    var debuggerAgent = this;
+    this.requestSeqToCallback_[cmd.getSequenceNumber()] = function(msg) {
+      // Handle the response iff the context id hasn't changed since the request
+      // was issued. Otherwise if the context id did change all up-to-date
+      // scripts will be pushed in after compile events and there is no need to
+      // handle the response.
+      if (contextId == debuggerAgent.contextId_) {
+        debuggerAgent.handleScriptsResponse_(msg);
+      }
+    };
+  }
+};
+
+
+/**
+ * Handles output sent by v8 debugger. The output is either asynchronous event
+ * or response to a previously sent request.  See protocol definitioun for more
+ * details on the output format.
+ * @param {string} output
+ */
+devtools.DebuggerAgent.prototype.handleDebuggerOutput_ = function(output) {
+  var msg;
+  try {
+    msg = new devtools.DebuggerMessage(output);
+  } catch(e) {
+    debugPrint('Failed to handle debugger reponse:\n' + e);
+    throw e;
+  }
+
+  if (msg.getType() == 'event') {
+    if (msg.getEvent() == 'break') {
+      this.handleBreakEvent_(msg);
+    } else if (msg.getEvent() == 'exception') {
+      this.handleExceptionEvent_(msg);
+    } else if (msg.getEvent() == 'afterCompile') {
+      this.handleAfterCompileEvent_(msg);
+    }
+  } else if (msg.getType() == 'response') {
+    if (msg.getCommand() == 'scripts') {
+      this.invokeCallbackForResponse_(msg);
+    } else if (msg.getCommand() == 'setbreakpoint') {
+      this.handleSetBreakpointResponse_(msg);
+    } else if (msg.getCommand() == 'clearbreakpoint') {
+      this.handleClearBreakpointResponse_(msg);
+    } else if (msg.getCommand() == 'backtrace') {
+      this.handleBacktraceResponse_(msg);
+    } else if (msg.getCommand() == 'lookup') {
+      this.invokeCallbackForResponse_(msg);
+    } else if (msg.getCommand() == 'evaluate') {
+      this.invokeCallbackForResponse_(msg);
+    } else if (msg.getCommand() == 'scope') {
+      this.invokeCallbackForResponse_(msg);
+    }
+  }
+};
+
+
+/**
+ * @param {devtools.DebuggerMessage} msg
+ */
+devtools.DebuggerAgent.prototype.handleBreakEvent_ = function(msg) {
+  // Force scrips panel to be shown first.
+  WebInspector.currentPanel = WebInspector.panels.scripts;
+
+  var body = msg.getBody();
+
+  var line = devtools.DebuggerAgent.v8ToWwebkitLineNumber_(body.sourceLine);
+  this.requestBacktrace_();
+};
+
+
+/**
+ * @param {devtools.DebuggerMessage} msg
+ */
+devtools.DebuggerAgent.prototype.handleExceptionEvent_ = function(msg) {
+  // Force scrips panel to be shown first.
+  WebInspector.currentPanel = WebInspector.panels.scripts;
+
+  var body = msg.getBody();
+  if (this.pauseOnExceptions_) {
+    var body = msg.getBody();
+    var line = devtools.DebuggerAgent.v8ToWwebkitLineNumber_(body.sourceLine);
+    this.createExceptionMessage_(body.script.name, line, body.exception.text);
+    this.requestBacktrace_();
+  } else {
+    this.resumeExecution();
+  }
+};
+
+
+/**
+ * @param {devtools.DebuggerMessage} msg
+ */
+devtools.DebuggerAgent.prototype.handleScriptsResponse_ = function(msg) {
+  var scripts = msg.getBody();
+  for (var i = 0; i < scripts.length; i++) {
+    var script = scripts[i];
+
+    // Skip scripts from other tabs.
+    if (!this.isScriptFromInspectedContext_(script, msg)) {
+      continue;
+    }
+
+    // We may already have received the info in an afterCompile event.
+    if (script.id in this.parsedScripts_) {
+      continue;
+    }
+    this.addScriptInfo_(script, msg);
+  }
+};
+
+
+/**
+ * @param {Object} script Json object representing script.
+ * @param {devtools.DebuggerMessage} msg Debugger response.
+ */
+devtools.DebuggerAgent.prototype.isScriptFromInspectedContext_ = function(
+    script, msg) {
+  if (!script.context) {
+    // Always ignore scripts from the utility context.
+    return false;
+  }
+  var context = msg.lookup(script.context.ref);
+  var scriptContextId = context.data;
+  if (!goog.isDef(scriptContextId)) {
+    return false; // Always ignore scripts from the utility context.
+  }
+  if (this.contextId_ === null) {
+    return true;
+  }
+  return (scriptContextId.value == this.contextId_);
+};
+
+
+/**
+ * @param {devtools.DebuggerMessage} msg
+ */
+devtools.DebuggerAgent.prototype.handleSetBreakpointResponse_ = function(msg) {
+  var requestSeq = msg.getRequestSeq();
+  var breakpointInfo = this.requestNumberToBreakpointInfo_[requestSeq];
+  if (!breakpointInfo) {
+    // TODO(yurys): handle this case
+    return;
+  }
+  delete this.requestNumberToBreakpointInfo_[requestSeq];
+  if (!msg.isSuccess()) {
+    // TODO(yurys): handle this case
+    return;
+  }
+  var idInV8 = msg.getBody().breakpoint;
+  breakpointInfo.setV8Id(idInV8);
+
+  if (breakpointInfo.isRemoved()) {
+    this.requestClearBreakpoint_(idInV8);
+  }
+};
+
+
+/**
+ * @param {devtools.DebuggerMessage} msg
+ */
+devtools.DebuggerAgent.prototype.handleAfterCompileEvent_ = function(msg) {
+  if (!this.contextId_) {
+    // Ignore scripts delta if main request has not been issued yet.
+    return;
+  }
+  var script = msg.getBody().script;
+
+  // Ignore scripts from other tabs.
+  if (!this.isScriptFromInspectedContext_(script, msg)) {
+    return;
+  }
+  this.addScriptInfo_(script, msg);
+};
+
+
+/**
+ * Handles current profiler status.
+ * @param {number} modules List of active (started) modules.
+ */
+devtools.DebuggerAgent.prototype.didGetActiveProfilerModules_ = function(
+    modules) {
+  var profModules = devtools.DebuggerAgent.ProfilerModules;
+  var profModuleNone = profModules.PROFILER_MODULE_NONE;
+  if (modules != profModuleNone &&
+      this.activeProfilerModules_ == profModuleNone) {
+    // Start to query log data.
+    RemoteDebuggerAgent.GetNextLogLines();
+  }
+  this.activeProfilerModules_ = modules;
+  // Update buttons.
+  WebInspector.setRecordingProfile(modules & profModules.PROFILER_MODULE_CPU);
+  if (modules != profModuleNone) {
+    // Monitor profiler state. It can stop itself on buffer fill-up.
+    setTimeout(
+        function() { RemoteDebuggerAgent.GetActiveProfilerModules(); }, 1000);
+  }
+};
+
+
+/**
+ * Handles a portion of a profiler log retrieved by GetNextLogLines call.
+ * @param {string} log A portion of profiler log.
+ */
+devtools.DebuggerAgent.prototype.didGetNextLogLines_ = function(log) {
+  if (log.length > 0) {
+    this.profilerProcessor_.processLogChunk(log);
+  } else if (this.activeProfilerModules_ ==
+      devtools.DebuggerAgent.ProfilerModules.PROFILER_MODULE_NONE) {
+    // No new data and profiling is stopped---suspend log reading.
+    return;
+  }
+  setTimeout(function() { RemoteDebuggerAgent.GetNextLogLines(); }, 500);
+};
+
+
+/**
+ * Adds the script info to the local cache. This method assumes that the script
+ * is not in the cache yet.
+ * @param {Object} script Script json object from the debugger message.
+ * @param {devtools.DebuggerMessage} msg Debugger message containing the script
+ *     data.
+ */
+devtools.DebuggerAgent.prototype.addScriptInfo_ = function(script, msg) {
+  var context = msg.lookup(script.context.ref);
+  var contextType = context.data.type;
+  this.parsedScripts_[script.id] = new devtools.ScriptInfo(
+      script.id, script.name, script.lineOffset, contextType);
+  if (WebInspector.panels.scripts.element.parentElement) {
+    // Only report script as parsed after scripts panel has been shown.
+    WebInspector.parsedScriptSource(
+        script.id, script.name, script.source, script.lineOffset);
+  }
+};
+
+
+/**
+ * @param {devtools.DebuggerMessage} msg
+ */
+devtools.DebuggerAgent.prototype.handleClearBreakpointResponse_ = function(
+    msg) {
+  // Do nothing.
+};
+
+
+/**
+ * Handles response to 'backtrace' command.
+ * @param {devtools.DebuggerMessage} msg
+ */
+devtools.DebuggerAgent.prototype.handleBacktraceResponse_ = function(msg) {
+  var frames = msg.getBody().frames;
+  this.callFrames_ = [];
+  for (var i = 0; i <  frames.length; ++i) {
+    this.callFrames_.push(this.formatCallFrame_(frames[i]));
+  }
+  WebInspector.pausedScript(this.callFrames_);
+  this.showPendingExceptionMessage_();
+  DevToolsHost.activateWindow();
+};
+
+
+/**
+ * Evaluates code on given callframe.
+ */
+devtools.DebuggerAgent.prototype.evaluateInCallFrame = function(
+    callFrameId, code, callback) {
+  var callFrame = this.callFrames_[callFrameId];
+  callFrame.evaluate_(code, callback);
+};
+
+
+/**
+ * Handles response to a command by invoking its callback (if any).
+ * @param {devtools.DebuggerMessage} msg
+ * @return {boolean} Whether a callback for the given message was found and
+ *     excuted.
+ */
+devtools.DebuggerAgent.prototype.invokeCallbackForResponse_ = function(msg) {
+  var callback = this.requestSeqToCallback_[msg.getRequestSeq()];
+  if (!callback) {
+    // It may happend if reset was called.
+    return false;
+  }
+  delete this.requestSeqToCallback_[msg.getRequestSeq()];
+  callback(msg);
+  return true;
+};
+
+
+/**
+ * @param {Object} stackFrame Frame json object from 'backtrace' response.
+ * @return {!devtools.CallFrame} Object containing information related to the
+ *     call frame in the format expected by ScriptsPanel and its panes.
+ */
+devtools.DebuggerAgent.prototype.formatCallFrame_ = function(stackFrame) {
+  var func = stackFrame.func;
+  var sourceId = func.scriptId;
+
+  // Add service script if it does not exist.
+  var existingScript = this.parsedScripts_[sourceId];
+  if (!existingScript) {
+    this.parsedScripts_[sourceId] = new devtools.ScriptInfo(
+        sourceId, null /* name */, 0 /* line */, 'unknown' /* type */,
+        true /* unresolved */);
+    WebInspector.parsedScriptSource(sourceId, null, null, 0);
+  }
+
+  var funcName = func.name || func.inferredName || '(anonymous function)';
+  var line = devtools.DebuggerAgent.v8ToWwebkitLineNumber_(stackFrame.line);
+
+  // Add basic scope chain info with scope variables.
+  var scopeChain = [];
+  var ScopeType = devtools.DebuggerAgent.ScopeType;
+  for (var i = 0; i < stackFrame.scopes.length; i++) {
+    var scope = stackFrame.scopes[i];
+    scope.frameNumber = stackFrame.index;
+    var scopeObjectProxy = new WebInspector.ObjectProxy(scope, [], 0, '', true);
+    scopeObjectProxy.isScope = true;
+    scopeObjectProxy.properties = {};  // TODO(pfeldman): Fix autocomplete.
+    switch(scope.type) {
+      case ScopeType.Global:
+        scopeObjectProxy.isDocument = true;
+        break;
+      case ScopeType.Local:
+        scopeObjectProxy.isLocal = true;
+        scopeObjectProxy.thisObject =
+            devtools.DebuggerAgent.formatObjectProxy_(stackFrame.receiver);
+        break;
+      case ScopeType.With:
+      // Catch scope is treated as a regular with scope by WebKit so we
+      // also treat it this way.
+      case ScopeType.Catch:
+        scopeObjectProxy.isWithBlock = true;
+        break;
+      case ScopeType.Closure:
+        scopeObjectProxy.isClosure = true;
+        break;
+    }
+    scopeChain.push(scopeObjectProxy);
+  }
+  return new devtools.CallFrame(stackFrame.index, 'function', funcName,
+      sourceId, line, scopeChain);
+};
+
+
+/**
+ * Collects properties for an object from the debugger response.
+ * @param {Object} object An object from the debugger protocol response.
+ * @param {Array.<WebInspector.ObjectPropertyProxy>} result An array to put the
+ *     properties into.
+ * @param {boolean} noIntrinsic Whether intrinsic properties should be
+ *     included.
+ */
+devtools.DebuggerAgent.formatObjectProperties_ = function(object, result,
+                                                          noIntrinsic) {
+  devtools.DebuggerAgent.propertiesToProxies_(object.properties, result);
+  if (noIntrinsic) {
+    return;
+  }
+
+  result.push(new WebInspector.ObjectPropertyProxy('__proto__',
+      devtools.DebuggerAgent.formatObjectProxy_(object.protoObject)));
+  result.push(new WebInspector.ObjectPropertyProxy('prototype',
+      devtools.DebuggerAgent.formatObjectProxy_(object.prototypeObject)));
+  result.push(new WebInspector.ObjectPropertyProxy('constructor',
+      devtools.DebuggerAgent.formatObjectProxy_(object.constructorFunction)));
+};
+
+
+/**
+ * For each property in 'properties' creates its proxy representative.
+ * @param {Array.<Object>} properties Receiver properties or locals array from
+ *     'backtrace' response.
+ * @param {Array.<WebInspector.ObjectPropertyProxy>} Results holder.
+ */
+devtools.DebuggerAgent.propertiesToProxies_ = function(properties, result) {
+  var map = {};
+  for (var i = 0; i < properties.length; ++i) {
+    var property = properties[i];
+    var name = String(property.name);
+    if (name in map) {
+      continue;
+    }
+    map[name] = true;
+    var value = devtools.DebuggerAgent.formatObjectProxy_(property.value);
+    var propertyProxy = new WebInspector.ObjectPropertyProxy(name, value);
+    result.push(propertyProxy);
+  }
+};
+
+
+/**
+ * @param {Object} v An object reference from the debugger response.
+ * @return {*} The value representation expected by ScriptsPanel.
+ */
+devtools.DebuggerAgent.formatObjectProxy_ = function(v) {
+  var description;
+  var hasChildren = false;
+  if (v.type == 'object') {
+    description = v.className;
+    hasChildren = true;
+  } else if (v.type == 'function') {
+    if (v.source) {
+      description = v.source;
+    } else {
+      description = 'function ' + v.name + '()';
+    }
+    hasChildren = true;
+  } else if (goog.isDef(v.value)) {
+    description = v.value;
+  } else if (v.type == 'undefined') {
+    description = 'undefined';
+  } else if (v.type == 'null') {
+    description = 'null';
+  } else {
+    description = '<unresolved ref: ' + v.ref + ', type: ' + v.type + '>';
+  }
+  var proxy = new WebInspector.ObjectProxy(v, [], 0, description, hasChildren);
+  proxy.type = v.type;
+  proxy.isV8Ref = true;
+  return proxy;
+};
+
+
+/**
+ * Converts line number from Web Inspector UI(1-based) to v8(0-based).
+ * @param {number} line Resource line number in Web Inspector UI.
+ * @return {number} The line number in v8.
+ */
+devtools.DebuggerAgent.webkitToV8LineNumber_ = function(line) {
+  return line - 1;
+};
+
+
+/**
+ * Converts line number from v8(0-based) to Web Inspector UI(1-based).
+ * @param {number} line Resource line number in v8.
+ * @return {number} The line number in Web Inspector.
+ */
+devtools.DebuggerAgent.v8ToWwebkitLineNumber_ = function(line) {
+  return line + 1;
+};
+
+
+/**
+ * @param {number} scriptId Id of the script.
+ * @param {?string} url Script resource URL if any.
+ * @param {number} lineOffset First line 0-based offset in the containing
+ *     document.
+ * @param {string} contextType Type of the script's context:
+ *     "page" - regular script from html page
+ *     "injected" - extension content script
+ * @param {bool} opt_isUnresolved If true, script will not be resolved.
+ * @constructor
+ */
+devtools.ScriptInfo = function(
+    scriptId, url, lineOffset, contextType, opt_isUnresolved) {
+  this.scriptId_ = scriptId;
+  this.lineOffset_ = lineOffset;
+  this.contextType_ = contextType;
+  this.url_ = url;
+  this.isUnresolved_ = opt_isUnresolved;
+
+  this.lineToBreakpointInfo_ = {};
+};
+
+
+/**
+ * @return {number}
+ */
+devtools.ScriptInfo.prototype.getLineOffset = function() {
+  return this.lineOffset_;
+};
+
+
+/**
+ * @return {string}
+ */
+devtools.ScriptInfo.prototype.getContextType = function() {
+  return this.contextType_;
+};
+
+
+/**
+ * @return {?string}
+ */
+devtools.ScriptInfo.prototype.getUrl = function() {
+  return this.url_;
+};
+
+
+/**
+ * @return {?bool}
+ */
+devtools.ScriptInfo.prototype.isUnresolved = function() {
+  return this.isUnresolved_;
+};
+
+
+/**
+ * @param {number} line 0-based line number in the script.
+ * @return {?devtools.BreakpointInfo} Information on a breakpoint at the
+ *     specified line in the script or undefined if there is no breakpoint at
+ *     that line.
+ */
+devtools.ScriptInfo.prototype.getBreakpointInfo = function(line) {
+  return this.lineToBreakpointInfo_[line];
+};
+
+
+/**
+ * Adds breakpoint info to the script.
+ * @param {devtools.BreakpointInfo} breakpoint
+ */
+devtools.ScriptInfo.prototype.addBreakpointInfo = function(breakpoint) {
+  this.lineToBreakpointInfo_[breakpoint.getLine()] = breakpoint;
+};
+
+
+/**
+ * @param {devtools.BreakpointInfo} breakpoint Breakpoint info to be removed.
+ */
+devtools.ScriptInfo.prototype.removeBreakpointInfo = function(breakpoint) {
+  var line = breakpoint.getLine();
+  delete this.lineToBreakpointInfo_[line];
+};
+
+
+
+/**
+ * @param {number} line Breakpoint 0-based line number in the containing script.
+ * @constructor
+ */
+devtools.BreakpointInfo = function(line) {
+  this.line_ = line;
+  this.v8id_ = -1;
+  this.removed_ = false;
+};
+
+
+/**
+ * @return {number}
+ */
+devtools.BreakpointInfo.prototype.getLine = function(n) {
+  return this.line_;
+};
+
+
+/**
+ * @return {number} Unique identifier of this breakpoint in the v8 debugger.
+ */
+devtools.BreakpointInfo.prototype.getV8Id = function(n) {
+  return this.v8id_;
+};
+
+
+/**
+ * Sets id of this breakpoint in the v8 debugger.
+ * @param {number} id
+ */
+devtools.BreakpointInfo.prototype.setV8Id = function(id) {
+  this.v8id_ = id;
+};
+
+
+/**
+ * Marks this breakpoint as removed from the  front-end.
+ */
+devtools.BreakpointInfo.prototype.markAsRemoved = function() {
+  this.removed_ = true;
+};
+
+
+/**
+ * @return {boolean} Whether this breakpoint has been removed from the
+ *     front-end.
+ */
+devtools.BreakpointInfo.prototype.isRemoved = function() {
+  return this.removed_;
+};
+
+
+/**
+ * Call stack frame data.
+ * @param {string} id CallFrame id.
+ * @param {string} type CallFrame type.
+ * @param {string} functionName CallFrame type.
+ * @param {string} sourceID Source id.
+ * @param {number} line Source line.
+ * @param {Array.<Object>} scopeChain Array of scoped objects.
+ * @construnctor
+ */
+devtools.CallFrame = function(id, type, functionName, sourceID, line,
+    scopeChain) {
+  this.id = id;
+  this.type = type;
+  this.functionName = functionName;
+  this.sourceID = sourceID;
+  this.line = line;
+  this.scopeChain = scopeChain;
+};
+
+
+/**
+ * This method issues asynchronous evaluate request, reports result to the
+ * callback.
+ * @param {string} expression An expression to be evaluated in the context of
+ *     this call frame.
+ * @param {function(Object):undefined} callback Callback to report result to.
+ */
+devtools.CallFrame.prototype.evaluate_ = function(expression, callback) {
+  devtools.tools.getDebuggerAgent().requestEvaluate({
+      'expression': expression,
+      'frame': this.id,
+      'global': false,
+      'disable_break': false,
+      'compactFormat': true
+    },
+    function(response) {
+      var result = {};
+      if (response.isSuccess()) {
+        result.value = devtools.DebuggerAgent.formatObjectProxy_(
+            response.getBody());
+      } else {
+        result.value = response.getMessage();
+        result.isException = true;
+      }
+      callback(result);
+    });
+};
+
+
+/**
+ * JSON based commands sent to v8 debugger.
+ * @param {string} command Name of the command to execute.
+ * @param {Object} opt_arguments Command-specific arguments map.
+ * @constructor
+ */
+devtools.DebugCommand = function(command, opt_arguments) {
+  this.command_ = command;
+  this.type_ = 'request';
+  this.seq_ = ++devtools.DebugCommand.nextSeq_;
+  if (opt_arguments) {
+    this.arguments_ = opt_arguments;
+  }
+};
+
+
+/**
+ * Next unique number to be used as debugger request sequence number.
+ * @type {number}
+ */
+devtools.DebugCommand.nextSeq_ = 1;
+
+
+/**
+ * @return {number}
+ */
+devtools.DebugCommand.prototype.getSequenceNumber = function() {
+  return this.seq_;
+};
+
+
+/**
+ * @return {string}
+ */
+devtools.DebugCommand.prototype.toJSONProtocol = function() {
+  var json = {
+    'seq': this.seq_,
+    'type': this.type_,
+    'command': this.command_
+  }
+  if (this.arguments_) {
+    json.arguments = this.arguments_;
+  }
+  return JSON.stringify(json);
+};
+
+
+/**
+ * JSON messages sent from v8 debugger. See protocol definition for more
+ * details: http://code.google.com/p/v8/wiki/DebuggerProtocol
+ * @param {string} msg Raw protocol packet as JSON string.
+ * @constructor
+ */
+devtools.DebuggerMessage = function(msg) {
+  this.packet_ = JSON.parse(msg);
+  this.refs_ = [];
+  if (this.packet_.refs) {
+    for (var i = 0; i < this.packet_.refs.length; i++) {
+      this.refs_[this.packet_.refs[i].handle] = this.packet_.refs[i];
+    }
+  }
+};
+
+
+/**
+ * @return {string} The packet type.
+ */
+devtools.DebuggerMessage.prototype.getType = function() {
+  return this.packet_.type;
+};
+
+
+/**
+ * @return {?string} The packet event if the message is an event.
+ */
+devtools.DebuggerMessage.prototype.getEvent = function() {
+  return this.packet_.event;
+};
+
+
+/**
+ * @return {?string} The packet command if the message is a response to a
+ *     command.
+ */
+devtools.DebuggerMessage.prototype.getCommand = function() {
+  return this.packet_.command;
+};
+
+
+/**
+ * @return {number} The packet request sequence.
+ */
+devtools.DebuggerMessage.prototype.getRequestSeq = function() {
+  return this.packet_.request_seq;
+};
+
+
+/**
+ * @return {number} Whether the v8 is running after processing the request.
+ */
+devtools.DebuggerMessage.prototype.isRunning = function() {
+  return this.packet_.running ? true : false;
+};
+
+
+/**
+ * @return {boolean} Whether the request succeeded.
+ */
+devtools.DebuggerMessage.prototype.isSuccess = function() {
+  return this.packet_.success ? true : false;
+};
+
+
+/**
+ * @return {string}
+ */
+devtools.DebuggerMessage.prototype.getMessage = function() {
+  return this.packet_.message;
+};
+
+
+/**
+ * @return {Object} Parsed message body json.
+ */
+devtools.DebuggerMessage.prototype.getBody = function() {
+  return this.packet_.body;
+};
+
+
+/**
+ * @param {number} handle Object handle.
+ * @return {?Object} Returns the object with the handle if it was sent in this
+ *    message(some objects referenced by handles may be missing in the message).
+ */
+devtools.DebuggerMessage.prototype.lookup = function(handle) {
+  return this.refs_[handle];
+};