Wire up the Inspector V8 Debugger

sky/engine/core/inspector/InjectedScriptSource.js

+/*
+ * Copyright (C) 2007 Apple Inc.  All rights reserved.
+ * Copyright (C) 2013 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * @param {InjectedScriptHost} InjectedScriptHost
+ * @param {Window} inspectedWindow
+ * @param {number} injectedScriptId
+ */
+(function (InjectedScriptHost, inspectedWindow, injectedScriptId) {
+
+/**
+ * Protect against Object overwritten by the user code.
+ * @suppress {duplicate}
+ */
+var Object = /** @type {function(new:Object, *=)} */ ({}.constructor);
+
+/**
+ * @param {!Array.<T>} array
+ * @param {...} var_args
+ * @template T
+ */
+function push(array, var_args)
+{
+    for (var i = 1; i < arguments.length; ++i)
+        array[array.length] = arguments[i];
+}
+
+/**
+ * @param {!Arguments.<T>} array
+ * @param {number=} index
+ * @return {!Array.<T>}
+ * @template T
+ */
+function slice(array, index)
+{
+    var result = [];
+    for (var i = index || 0, j = 0; i < array.length; ++i, ++j)
+        result[j] = array[i];
+    return result;
+}
+
+/**
+ * @param {!Array.<T>} array1
+ * @param {!Array.<T>} array2
+ * @return {!Array.<T>}
+ * @template T
+ */
+function concat(array1, array2)
+{
+    var result = [];
+    for (var i = 0; i < array1.length; ++i)
+        push(result, array1[i]);
+    for (var i = 0; i < array2.length; ++i)
+        push(result, array2[i]);
+    return result;
+}
+
+/**
+ * @param {*} obj
+ * @return {string}
+ */
+function toString(obj)
+{
+    // We don't use String(obj) because it could be overriden.
+    return "" + obj;
+}
+
+/**
+ * @param {*} obj
+ * @return {string}
+ */
+function toStringDescription(obj)
+{
+    if (typeof obj === "number" && obj === 0 && 1 / obj < 0)
+        return "-0"; // Negative zero.
+    return "" + obj;
+}
+
+/**
+ * Please use this bind, not the one from Function.prototype
+ * @param {function(...)} func
+ * @param {?Object} thisObject
+ * @param {...} var_args
+ * @return {function(...)}
+ */
+function bind(func, thisObject, var_args)
+{
+    var args = slice(arguments, 2);
+
+    /**
+     * @param {...} var_args
+     */
+    function bound(var_args)
+    {
+        return InjectedScriptHost.callFunction(func, thisObject, concat(args, slice(arguments)));
+    }
+    bound.toString = function()
+    {
+        return "bound: " + func;
+    };
+    return bound;
+}
+
+/**
+ * @param {T} obj
+ * @return {T}
+ * @template T
+ */
+function nullifyObjectProto(obj)
+{
+    if (obj && typeof obj === "object")
+        obj.__proto__ = null;
+    return obj;
+}
+
+/**
+ * @param {*} obj
+ * @return {boolean}
+ */
+function isUInt32(obj)
+{
+    return typeof obj === "number" && obj >>> 0 === obj && (obj > 0 || 1 / obj > 0);
+}
+
+/**
+ * FireBug's array detection.
+ * @param {*} obj
+ * @return {boolean}
+ */
+function isArrayLike(obj)
+{
+    if (typeof obj !== "object")
+        return false;
+    try {
+        if (typeof obj.splice === "function")
+            return isUInt32(obj.length);
+    } catch (e) {
+    }
+    return false;
+}
+
+/**
+ * @param {number} a
+ * @param {number} b
+ * @return {number}
+ */
+function max(a, b)
+{
+    return a > b ? a : b;
+}
+
+/**
+ * FIXME: Remove once ES6 is supported natively by JS compiler.
+ * @param {*} obj
+ * @return {boolean}
+ */
+function isSymbol(obj)
+{
+    var type = typeof obj;
+    return (type === "symbol");
+}
+
+/**
+ * @constructor
+ */
+var InjectedScript = function()
+{
+    /** @type {number} */
+    this._lastBoundObjectId = 1;
+    /** @type {!Object.<number, (!Object|symbol)>} */
+    this._idToWrappedObject = { __proto__: null };
+    /** @type {!Object.<number, string>} */
+    this._idToObjectGroupName = { __proto__: null };
+    /** @type {!Object.<string, !Array.<number>>} */
+    this._objectGroups = { __proto__: null };
+    /** @type {!Object.<string, !Object>} */
+    this._modules = { __proto__: null };
+}
+
+/**
+ * @type {!Object.<string, boolean>}
+ * @const
+ */
+InjectedScript.primitiveTypes = {
+    "undefined": true,
+    "boolean": true,
+    "number": true,
+    "string": true,
+    __proto__: null
+}
+
+InjectedScript.prototype = {
+    /**
+     * @param {*} object
+     * @return {boolean}
+     */
+    isPrimitiveValue: function(object)
+    {
+        // FIXME(33716): typeof document.all is always 'undefined'.
+        return InjectedScript.primitiveTypes[typeof object] && !this._isHTMLAllCollection(object);
+    },
+
+    /**
+     * @param {*} object
+     * @param {string} groupName
+     * @param {boolean} canAccessInspectedWindow
+     * @param {boolean} generatePreview
+     * @return {!RuntimeAgent.RemoteObject}
+     */
+    wrapObject: function(object, groupName, canAccessInspectedWindow, generatePreview)
+    {
+        if (canAccessInspectedWindow)
+            return this._wrapObject(object, groupName, false, generatePreview);
+        return this._fallbackWrapper(object);
+    },
+
+    /**
+     * @param {*} object
+     * @return {!RuntimeAgent.RemoteObject}
+     */
+    _fallbackWrapper: function(object)
+    {
+        var result = { __proto__: null };
+        result.type = typeof object;
+        if (this.isPrimitiveValue(object))
+            result.value = object;
+        else
+            result.description = toString(object);
+        return /** @type {!RuntimeAgent.RemoteObject} */ (result);
+    },
+
+    /**
+     * @param {boolean} canAccessInspectedWindow
+     * @param {!Object} table
+     * @param {!Array.<string>|string|boolean} columns
+     * @return {!RuntimeAgent.RemoteObject}
+     */
+    wrapTable: function(canAccessInspectedWindow, table, columns)
+    {
+        if (!canAccessInspectedWindow)
+            return this._fallbackWrapper(table);
+        var columnNames = null;
+        if (typeof columns === "string")
+            columns = [columns];
+        if (InjectedScriptHost.subtype(columns) === "array") {
+            columnNames = [];
+            for (var i = 0; i < columns.length; ++i)
+                columnNames[i] = toString(columns[i]);
+        }
+        return this._wrapObject(table, "console", false, true, columnNames, true);
+    },
+
+    /**
+     * @param {*} object
+     */
+    inspectNode: function(object)
+    {
+        this._inspect(object);
+    },
+
+    /**
+     * @param {*} object
+     * @return {*}
+     */
+    _inspect: function(object)
+    {
+        if (arguments.length === 0)
+            return;
+
+        var objectId = this._wrapObject(object, "");
+        var hints = { __proto__: null };
+
+        InjectedScriptHost.inspect(objectId, hints);
+        return object;
+    },
+
+    /**
+     * This method cannot throw.
+     * @param {*} object
+     * @param {string=} objectGroupName
+     * @param {boolean=} forceValueType
+     * @param {boolean=} generatePreview
+     * @param {?Array.<string>=} columnNames
+     * @param {boolean=} isTable
+     * @return {!RuntimeAgent.RemoteObject}
+     * @suppress {checkTypes}
+     */
+    _wrapObject: function(object, objectGroupName, forceValueType, generatePreview, columnNames, isTable)
+    {
+        try {
+            return new InjectedScript.RemoteObject(object, objectGroupName, forceValueType, generatePreview, columnNames, isTable);
+        } catch (e) {
+            try {
+                var description = injectedScript._describe(e);
+            } catch (ex) {
+                var description = "<failed to convert exception to string>";
+            }
+            return new InjectedScript.RemoteObject(description);
+        }
+    },
+
+    /**
+     * @param {!Object|symbol} object
+     * @param {string=} objectGroupName
+     * @return {string}
+     */
+    _bind: function(object, objectGroupName)
+    {
+        var id = this._lastBoundObjectId++;
+        this._idToWrappedObject[id] = object;
+        var objectId = "{\"injectedScriptId\":" + injectedScriptId + ",\"id\":" + id + "}";
+        if (objectGroupName) {
+            var group = this._objectGroups[objectGroupName];
+            if (!group) {
+                group = [];
+                this._objectGroups[objectGroupName] = group;
+            }
+            push(group, id);
+            this._idToObjectGroupName[id] = objectGroupName;
+        }
+        return objectId;
+    },
+
+    /**
+     * @param {string} objectId
+     * @return {!Object}
+     */
+    _parseObjectId: function(objectId)
+    {
+        return nullifyObjectProto(InjectedScriptHost.eval("(" + objectId + ")"));
+    },
+
+    /**
+     * @param {string} objectGroupName
+     */
+    releaseObjectGroup: function(objectGroupName)
+    {
+        if (objectGroupName === "console")
+            delete this._lastResult;
+        var group = this._objectGroups[objectGroupName];
+        if (!group)
+            return;
+        for (var i = 0; i < group.length; i++)
+            this._releaseObject(group[i]);
+        delete this._objectGroups[objectGroupName];
+    },
+
+    /**
+     * @param {string} methodName
+     * @param {string} args
+     * @return {*}
+     */
+    dispatch: function(methodName, args)
+    {
+        var argsArray = InjectedScriptHost.eval("(" + args + ")");
+        var result = InjectedScriptHost.callFunction(this[methodName], this, argsArray);
+        if (typeof result === "undefined") {
+            inspectedWindow.console.error("Web Inspector error: InjectedScript.%s returns undefined", methodName);
+            result = null;
+        }
+        return result;
+    },
+
+    /**
+     * @param {string} objectId
+     * @param {boolean} ownProperties
+     * @param {boolean} accessorPropertiesOnly
+     * @return {!Array.<!RuntimeAgent.PropertyDescriptor>|boolean}
+     */
+    getProperties: function(objectId, ownProperties, accessorPropertiesOnly)
+    {
+        var parsedObjectId = this._parseObjectId(objectId);
+        var object = this._objectForId(parsedObjectId);
+        var objectGroupName = this._idToObjectGroupName[parsedObjectId.id];
+
+        if (!this._isDefined(object) || isSymbol(object))
+            return false;
+        object = /** @type {!Object} */ (object);
+        var descriptors = this._propertyDescriptors(object, ownProperties, accessorPropertiesOnly);
+
+        // Go over properties, wrap object values.
+        for (var i = 0; i < descriptors.length; ++i) {
+            var descriptor = descriptors[i];
+            if ("get" in descriptor)
+                descriptor.get = this._wrapObject(descriptor.get, objectGroupName);
+            if ("set" in descriptor)
+                descriptor.set = this._wrapObject(descriptor.set, objectGroupName);
+            if ("value" in descriptor)
+                descriptor.value = this._wrapObject(descriptor.value, objectGroupName);
+            if (!("configurable" in descriptor))
+                descriptor.configurable = false;
+            if (!("enumerable" in descriptor))
+                descriptor.enumerable = false;
+            if ("symbol" in descriptor)
+                descriptor.symbol = this._wrapObject(descriptor.symbol, objectGroupName);
+        }
+        return descriptors;
+    },
+
+    /**
+     * @param {string} objectId
+     * @return {!Array.<!Object>|boolean}
+     */
+    getInternalProperties: function(objectId)
+    {
+        var parsedObjectId = this._parseObjectId(objectId);
+        var object = this._objectForId(parsedObjectId);
+        var objectGroupName = this._idToObjectGroupName[parsedObjectId.id];
+        if (!this._isDefined(object) || isSymbol(object))
+            return false;
+        object = /** @type {!Object} */ (object);
+        var descriptors = [];
+        var internalProperties = InjectedScriptHost.getInternalProperties(object);
+        if (internalProperties) {
+            for (var i = 0; i < internalProperties.length; i++) {
+                var property = internalProperties[i];
+                var descriptor = {
+                    name: property.name,
+                    value: this._wrapObject(property.value, objectGroupName),
+                    __proto__: null
+                };
+                push(descriptors, descriptor);
+            }
+        }
+        return descriptors;
+    },
+
+    /**
+     * @param {string} functionId
+     * @return {!DebuggerAgent.FunctionDetails|string}
+     */
+    getFunctionDetails: function(functionId)
+    {
+        var parsedFunctionId = this._parseObjectId(functionId);
+        var func = this._objectForId(parsedFunctionId);
+        if (typeof func !== "function")
+            return "Cannot resolve function by id.";
+        var details = nullifyObjectProto(InjectedScriptHost.functionDetails(func));
+        if ("rawScopes" in details) {
+            var objectGroupName = this._idToObjectGroupName[parsedFunctionId.id];
+            var rawScopes = details.rawScopes;
+            delete details.rawScopes;
+            var scopes = [];
+            for (var i = 0; i < rawScopes.length; ++i)
+                scopes[i] = InjectedScript.CallFrameProxy._createScopeJson(rawScopes[i].type, rawScopes[i].object, objectGroupName);
+            details.scopeChain = scopes;
+        }
+        return details;
+    },
+
+    /**
+     * @param {string} objectId
+     * @return {!Array.<!Object>|string}
+     */
+    getCollectionEntries: function(objectId)
+    {
+        var parsedObjectId = this._parseObjectId(objectId);
+        var object = this._objectForId(parsedObjectId);
+        if (!object || typeof object !== "object")
+            return "Could not find object with given id";
+        var entries = InjectedScriptHost.collectionEntries(object);
+        if (!entries)
+            return "Object with given id is not a collection";
+        var objectGroupName = this._idToObjectGroupName[parsedObjectId.id];
+        for (var i = 0; i < entries.length; ++i) {
+            var entry = nullifyObjectProto(entries[i]);
+            if ("key" in entry)
+                entry.key = this._wrapObject(entry.key, objectGroupName);
+            entry.value = this._wrapObject(entry.value, objectGroupName);
+            entries[i] = entry;
+        }
+        return entries;
+    },
+
+    /**
+     * @param {string} objectId
+     */
+    releaseObject: function(objectId)
+    {
+        var parsedObjectId = this._parseObjectId(objectId);
+        this._releaseObject(parsedObjectId.id);
+    },
+
+    /**
+     * @param {number} id
+     */
+    _releaseObject: function(id)
+    {
+        delete this._idToWrappedObject[id];
+        delete this._idToObjectGroupName[id];
+    },
+
+    /**
+     * @param {!Object} object
+     * @param {boolean=} ownProperties
+     * @param {boolean=} accessorPropertiesOnly
+     * @return {!Array.<!Object>}
+     */
+    _propertyDescriptors: function(object, ownProperties, accessorPropertiesOnly)
+    {
+        var descriptors = [];
+        var propertyProcessed = { __proto__: null };
+
+        /**
+         * @param {?Object} o
+         * @param {!Array.<string|symbol>} properties
+         */
+        function process(o, properties)
+        {
+            for (var i = 0; i < properties.length; ++i) {
+                var property = properties[i];
+                if (propertyProcessed[property])
+                    continue;
+
+                var name = property;
+                if (isSymbol(property))
+                    name = injectedScript._describe(property);
+
+                try {
+                    propertyProcessed[property] = true;
+                    var descriptor = nullifyObjectProto(InjectedScriptHost.suppressWarningsAndCallFunction(Object.getOwnPropertyDescriptor, Object, [o, property]));
+                    if (descriptor) {
+                        if (accessorPropertiesOnly && !("get" in descriptor || "set" in descriptor))
+                            continue;
+                    } else {
+                        // Not all bindings provide proper descriptors. Fall back to the writable, configurable property.
+                        if (accessorPropertiesOnly)
+                            continue;
+                        try {
+                            descriptor = { name: name, value: o[property], writable: false, configurable: false, enumerable: false, __proto__: null };
+                            if (o === object)
+                                descriptor.isOwn = true;
+                            push(descriptors, descriptor);
+                        } catch (e) {
+                            // Silent catch.
+                        }
+                        continue;
+                    }
+                } catch (e) {
+                    if (accessorPropertiesOnly)
+                        continue;
+                    var descriptor = { __proto__: null };
+                    descriptor.value = e;
+                    descriptor.wasThrown = true;
+                }
+
+                descriptor.name = name;
+                if (o === object)
+                    descriptor.isOwn = true;
+                if (isSymbol(property))
+                    descriptor.symbol = property;
+                push(descriptors, descriptor);
+            }
+        }
+
+        for (var o = object; this._isDefined(o); o = o.__proto__) {
+            // First call Object.keys() to enforce ordering of the property descriptors.
+            process(o, Object.keys(/** @type {!Object} */ (o)));
+            process(o, Object.getOwnPropertyNames(/** @type {!Object} */ (o)));
+            if (Object.getOwnPropertySymbols)
+                process(o, Object.getOwnPropertySymbols(/** @type {!Object} */ (o)));
+
+            if (ownProperties) {
+                if (object.__proto__ && !accessorPropertiesOnly)
+                    push(descriptors, { name: "__proto__", value: object.__proto__, writable: true, configurable: true, enumerable: false, isOwn: true, __proto__: null });
+                break;
+            }
+        }
+
+        return descriptors;
+    },
+
+    /**
+     * @param {string} expression
+     * @param {string} objectGroup
+     * @param {boolean} injectCommandLineAPI
+     * @param {boolean} returnByValue
+     * @param {boolean} generatePreview
+     * @return {*}
+     */
+    evaluate: function(expression, objectGroup, injectCommandLineAPI, returnByValue, generatePreview)
+    {
+        return this._evaluateAndWrap(null, null, expression, objectGroup, false, injectCommandLineAPI, returnByValue, generatePreview);
+    },
+
+    /**
+     * @param {string} objectId
+     * @param {string} expression
+     * @param {string} args
+     * @param {boolean} returnByValue
+     * @return {!Object|string}
+     */
+    callFunctionOn: function(objectId, expression, args, returnByValue)
+    {
+        var parsedObjectId = this._parseObjectId(objectId);
+        var object = this._objectForId(parsedObjectId);
+        if (!this._isDefined(object))
+            return "Could not find object with given id";
+
+        if (args) {
+            var resolvedArgs = [];
+            args = InjectedScriptHost.eval(args);
+            for (var i = 0; i < args.length; ++i) {
+                try {
+                    resolvedArgs[i] = this._resolveCallArgument(args[i]);
+                } catch (e) {
+                    return toString(e);
+                }
+            }
+        }
+
+        try {
+            var objectGroup = this._idToObjectGroupName[parsedObjectId.id];
+            var func = InjectedScriptHost.eval("(" + expression + ")");
+            if (typeof func !== "function")
+                return "Given expression does not evaluate to a function";
+
+            return { wasThrown: false,
+                     result: this._wrapObject(InjectedScriptHost.callFunction(func, object, resolvedArgs), objectGroup, returnByValue),
+                     __proto__: null };
+        } catch (e) {
+            return this._createThrownValue(e, objectGroup, false);
+        }
+    },
+
+    /**
+     * Resolves a value from CallArgument description.
+     * @param {!RuntimeAgent.CallArgument} callArgumentJson
+     * @return {*} resolved value
+     * @throws {string} error message
+     */
+    _resolveCallArgument: function(callArgumentJson)
+    {
+        callArgumentJson = nullifyObjectProto(callArgumentJson);
+        var objectId = callArgumentJson.objectId;
+        if (objectId) {
+            var parsedArgId = this._parseObjectId(objectId);
+            if (!parsedArgId || parsedArgId["injectedScriptId"] !== injectedScriptId)
+                throw "Arguments should belong to the same JavaScript world as the target object.";
+
+            var resolvedArg = this._objectForId(parsedArgId);
+            if (!this._isDefined(resolvedArg))
+                throw "Could not find object with given id";
+
+            return resolvedArg;
+        } else if ("value" in callArgumentJson) {
+            var value = callArgumentJson.value;
+            if (callArgumentJson.type === "number" && typeof value !== "number")
+                value = Number(value);
+            return value;
+        }
+        return undefined;
+    },
+
+    /**
+     * @param {?function(string):*} evalFunction
+     * @param {?Object} object
+     * @param {string} expression
+     * @param {string} objectGroup
+     * @param {boolean} isEvalOnCallFrame
+     * @param {boolean} injectCommandLineAPI
+     * @param {boolean} returnByValue
+     * @param {boolean} generatePreview
+     * @param {!Array.<!Object>=} scopeChain
+     * @return {!Object}
+     */
+    _evaluateAndWrap: function(evalFunction, object, expression, objectGroup, isEvalOnCallFrame, injectCommandLineAPI, returnByValue, generatePreview, scopeChain)
+    {
+        var wrappedResult = this._evaluateOn(evalFunction, object, objectGroup, expression, isEvalOnCallFrame, injectCommandLineAPI, scopeChain);
+        if (!wrappedResult.exceptionDetails) {
+            return { wasThrown: false,
+                     result: this._wrapObject(wrappedResult.result, objectGroup, returnByValue, generatePreview),
+                     __proto__: null };
+        }
+        return this._createThrownValue(wrappedResult.result, objectGroup, generatePreview, wrappedResult.exceptionDetails);
+    },
+
+    /**
+     * @param {*} value
+     * @param {string} objectGroup
+     * @param {boolean} generatePreview
+     * @param {!DebuggerAgent.ExceptionDetails=} exceptionDetails
+     * @return {!Object}
+     */
+    _createThrownValue: function(value, objectGroup, generatePreview, exceptionDetails)
+    {
+        var remoteObject = this._wrapObject(value, objectGroup, false, generatePreview && !(value instanceof Error));
+        if (!remoteObject.description){
+            try {
+                remoteObject.description = toStringDescription(value);
+            } catch (e) {}
+        }
+        return { wasThrown: true, result: remoteObject, exceptionDetails: exceptionDetails, __proto__: null };
+    },
+
+    /**
+     * @param {?function(string):*} evalFunction
+     * @param {?Object} object
+     * @param {string} objectGroup
+     * @param {string} expression
+     * @param {boolean} isEvalOnCallFrame
+     * @param {boolean} injectCommandLineAPI
+     * @param {!Array.<!Object>=} scopeChain
+     * @return {*}
+     */
+    _evaluateOn: function(evalFunction, object, objectGroup, expression, isEvalOnCallFrame, injectCommandLineAPI, scopeChain)
+    {
+        // Only install command line api object for the time of evaluation.
+        // Surround the expression in with statements to inject our command line API so that
+        // the window object properties still take more precedent than our API functions.
+
+        injectCommandLineAPI = injectCommandLineAPI && !("__commandLineAPI" in inspectedWindow);
+        var injectScopeChain = scopeChain && scopeChain.length && !("__scopeChainForEval" in inspectedWindow);
+
+        try {
+            var prefix = "";
+            var suffix = "";
+            if (injectCommandLineAPI) {
+                inspectedWindow.__commandLineAPI = new CommandLineAPI(this._commandLineAPIImpl, isEvalOnCallFrame ? object : null);
+                prefix = "with (__commandLineAPI || { __proto__: null }) {";
+                suffix = "}";
+            }
+            if (injectScopeChain) {
+                inspectedWindow.__scopeChainForEval = scopeChain;
+                for (var i = 0; i < scopeChain.length; ++i) {
+                    prefix = "with (__scopeChainForEval[" + i + "] || { __proto__: null }) {" + (suffix ? " " : "") + prefix;
+                    if (suffix)
+                        suffix += " }";
+                    else
+                        suffix = "}";
+                }
+            }
+
+            if (prefix)
+                expression = prefix + "\n" + expression + "\n" + suffix;
+            var wrappedResult = evalFunction ? InjectedScriptHost.callFunction(evalFunction, object, [expression]) : InjectedScriptHost.evaluateWithExceptionDetails(expression);
+            if (objectGroup === "console" && !wrappedResult.exceptionDetails)
+                this._lastResult = wrappedResult.result;
+            return wrappedResult;
+        } finally {
+            if (injectCommandLineAPI)
+                delete inspectedWindow.__commandLineAPI;
+            if (injectScopeChain)
+                delete inspectedWindow.__scopeChainForEval;
+        }
+    },
+
+    /**
+     * @param {?Object} callFrame
+     * @param {number} asyncOrdinal
+     * @return {!Array.<!InjectedScript.CallFrameProxy>|boolean}
+     */
+    wrapCallFrames: function(callFrame, asyncOrdinal)
+    {
+        if (!callFrame)
+            return false;
+
+        var result = [];
+        var depth = 0;
+        do {
+            result[depth] = new InjectedScript.CallFrameProxy(depth, callFrame, asyncOrdinal);
+            callFrame = callFrame.caller;
+            ++depth;
+        } while (callFrame);
+        return result;
+    },
+
+    /**
+     * @param {!Object} topCallFrame
+     * @param {!Array.<!Object>} asyncCallStacks
+     * @param {string} callFrameId
+     * @param {string} expression
+     * @param {string} objectGroup
+     * @param {boolean} injectCommandLineAPI
+     * @param {boolean} returnByValue
+     * @param {boolean} generatePreview
+     * @return {*}
+     */
+    evaluateOnCallFrame: function(topCallFrame, asyncCallStacks, callFrameId, expression, objectGroup, injectCommandLineAPI, returnByValue, generatePreview)
+    {
+        var parsedCallFrameId = nullifyObjectProto(InjectedScriptHost.eval("(" + callFrameId + ")"));
+        var callFrame = this._callFrameForParsedId(topCallFrame, parsedCallFrameId, asyncCallStacks);
+        if (!callFrame)
+            return "Could not find call frame with given id";
+        if (parsedCallFrameId["asyncOrdinal"])
+            return this._evaluateAndWrap(null, null, expression, objectGroup, false, injectCommandLineAPI, returnByValue, generatePreview, callFrame.scopeChain);
+        return this._evaluateAndWrap(callFrame.evaluateWithExceptionDetails, callFrame, expression, objectGroup, true, injectCommandLineAPI, returnByValue, generatePreview);
+    },
+
+    /**
+     * @param {!Object} topCallFrame
+     * @param {string} callFrameId
+     * @return {*}
+     */
+    restartFrame: function(topCallFrame, callFrameId)
+    {
+        var callFrame = this._callFrameForId(topCallFrame, callFrameId);
+        if (!callFrame)
+            return "Could not find call frame with given id";
+        var result = callFrame.restart();
+        if (result === false)
+            result = "Restart frame is not supported";
+        return result;
+    },
+
+    /**
+     * @param {!Object} topCallFrame
+     * @param {string} callFrameId
+     * @return {*} a stepIn position array ready for protocol JSON or a string error
+     */
+    getStepInPositions: function(topCallFrame, callFrameId)
+    {
+        var callFrame = this._callFrameForId(topCallFrame, callFrameId);
+        if (!callFrame)
+            return "Could not find call frame with given id";
+        var stepInPositionsUnpacked = JSON.parse(callFrame.stepInPositions);
+        if (typeof stepInPositionsUnpacked !== "object")
+            return "Step in positions not available";
+        return stepInPositionsUnpacked;
+    },
+
+    /**
+     * Either callFrameId or functionObjectId must be specified.
+     * @param {!Object} topCallFrame
+     * @param {string|boolean} callFrameId or false
+     * @param {string|boolean} functionObjectId or false
+     * @param {number} scopeNumber
+     * @param {string} variableName
+     * @param {string} newValueJsonString RuntimeAgent.CallArgument structure serialized as string
+     * @return {string|undefined} undefined if success or an error message
+     */
+    setVariableValue: function(topCallFrame, callFrameId, functionObjectId, scopeNumber, variableName, newValueJsonString)
+    {
+        var setter;
+        if (typeof callFrameId === "string") {
+            var callFrame = this._callFrameForId(topCallFrame, callFrameId);
+            if (!callFrame)
+                return "Could not find call frame with given id";
+            setter = bind(callFrame.setVariableValue, callFrame);
+        } else {
+            var parsedFunctionId = this._parseObjectId(/** @type {string} */ (functionObjectId));
+            var func = this._objectForId(parsedFunctionId);
+            if (typeof func !== "function")
+                return "Cannot resolve function by id.";
+            setter = bind(InjectedScriptHost.setFunctionVariableValue, InjectedScriptHost, func);
+        }
+        var newValueJson;
+        try {
+            newValueJson = InjectedScriptHost.eval("(" + newValueJsonString + ")");
+        } catch (e) {
+            return "Failed to parse new value JSON " + newValueJsonString + " : " + e;
+        }
+        var resolvedValue;
+        try {
+            resolvedValue = this._resolveCallArgument(newValueJson);
+        } catch (e) {
+            return toString(e);
+        }
+        try {
+            setter(scopeNumber, variableName, resolvedValue);
+        } catch (e) {
+            return "Failed to change variable value: " + e;
+        }
+        return undefined;
+    },
+
+    /**
+     * @param {!Object} topCallFrame
+     * @param {string} callFrameId
+     * @return {?Object}
+     */
+    _callFrameForId: function(topCallFrame, callFrameId)
+    {
+        var parsedCallFrameId = nullifyObjectProto(InjectedScriptHost.eval("(" + callFrameId + ")"));
+        return this._callFrameForParsedId(topCallFrame, parsedCallFrameId, []);
+    },
+
+    /**
+     * @param {!Object} topCallFrame
+     * @param {!Object} parsedCallFrameId
+     * @param {!Array.<!Object>} asyncCallStacks
+     * @return {?Object}
+     */
+    _callFrameForParsedId: function(topCallFrame, parsedCallFrameId, asyncCallStacks)
+    {
+        var asyncOrdinal = parsedCallFrameId["asyncOrdinal"]; // 1-based index
+        if (asyncOrdinal)
+            topCallFrame = asyncCallStacks[asyncOrdinal - 1];
+        var ordinal = parsedCallFrameId["ordinal"];
+        var callFrame = topCallFrame;
+        while (--ordinal >= 0 && callFrame)
+            callFrame = callFrame.caller;
+        return callFrame;
+    },
+
+    /**
+     * @param {!Object} objectId
+     * @return {!Object|symbol}
+     */
+    _objectForId: function(objectId)
+    {
+        return this._idToWrappedObject[objectId.id];
+    },
+
+    /**
+     * @param {string} objectId
+     * @return {!Object|symbol}
+     */
+    findObjectById: function(objectId)
+    {
+        var parsedObjectId = this._parseObjectId(objectId);
+        return this._objectForId(parsedObjectId);
+    },
+
+    /**
+     * @param {string} objectId
+     * @return {?Node}
+     */
+    nodeForObjectId: function(objectId)
+    {
+        var object = this.findObjectById(objectId);
+        if (!object || this._subtype(object) !== "node")
+            return null;
+        return /** @type {!Node} */ (object);
+    },
+
+    /**
+     * @param {string} name
+     * @return {!Object}
+     */
+    module: function(name)
+    {
+        return this._modules[name];
+    },
+
+    /**
+     * @param {string} name
+     * @param {string} source
+     * @return {?Object}
+     */
+    injectModule: function(name, source)
+    {
+        delete this._modules[name];
+        var moduleFunction = InjectedScriptHost.eval("(" + source + ")");
+        if (typeof moduleFunction !== "function") {
+            inspectedWindow.console.error("Web Inspector error: A function was expected for module %s evaluation", name);
+            return null;
+        }
+        var module = InjectedScriptHost.callFunction(moduleFunction, inspectedWindow, [InjectedScriptHost, inspectedWindow, injectedScriptId, this]);
+        this._modules[name] = module;
+        return module;
+    },
+
+    /**
+     * @param {*} object
+     * @return {boolean}
+     */
+    _isDefined: function(object)
+    {
+        return !!object || this._isHTMLAllCollection(object);
+    },
+
+    /**
+     * @param {*} object
+     * @return {boolean}
+     */
+    _isHTMLAllCollection: function(object)
+    {
+        // document.all is reported as undefined, but we still want to process it.
+        return (typeof object === "undefined") && InjectedScriptHost.isHTMLAllCollection(object);
+    },
+
+    /**
+     * @param {*} obj
+     * @return {?string}
+     */
+    _subtype: function(obj)
+    {
+        if (obj === null)
+            return "null";
+
+        if (this.isPrimitiveValue(obj))
+            return null;
+
+        var subtype = InjectedScriptHost.subtype(obj);
+        if (subtype)
+            return subtype;
+
+        if (isArrayLike(obj))
+            return "array";
+
+        // If owning frame has navigated to somewhere else window properties will be undefined.
+        return null;
+    },
+
+    /**
+     * @param {*} obj
+     * @return {?string}
+     */
+    _describe: function(obj)
+    {
+        if (this.isPrimitiveValue(obj))
+            return null;
+
+        var subtype = this._subtype(obj);
+
+        if (subtype === "regexp")
+            return toString(obj);
+
+        if (subtype === "date")
+            return toString(obj);
+
+        if (subtype === "node") {
+            var description = obj.nodeName.toLowerCase();
+            switch (obj.nodeType) {
+            case 1 /* Node.ELEMENT_NODE */:
+                description += obj.id ? "#" + obj.id : "";
+                var className = obj.className;
+                description += (className && typeof className === "string") ? "." + className.trim().replace(/\s+/g, ".") : "";
+                break;
+            case 10 /*Node.DOCUMENT_TYPE_NODE */:
+                description = "<!DOCTYPE " + description + ">";
+                break;
+            }
+            return description;
+        }
+
+        var className = InjectedScriptHost.internalConstructorName(obj);
+        if (subtype === "array") {
+            if (typeof obj.length === "number")
+                className += "[" + obj.length + "]";
+            return className;
+        }
+
+        // NodeList in JSC is a function, check for array prior to this.
+        if (typeof obj === "function")
+            return toString(obj);
+
+        if (isSymbol(obj)) {
+            try {
+                return InjectedScriptHost.callFunction(Symbol.prototype.toString, obj) || "Symbol";
+            } catch (e) {
+                return "Symbol";
+            }
+        }
+
+        if (obj instanceof Error && !!obj.message)
+            return className + ": " + obj.message;
+
+        return className;
+    }
+}
+
+/**
+ * @type {!InjectedScript}
+ * @const
+ */
+var injectedScript = new InjectedScript();
+
+/**
+ * @constructor
+ * @param {*} object
+ * @param {string=} objectGroupName
+ * @param {boolean=} forceValueType
+ * @param {boolean=} generatePreview
+ * @param {?Array.<string>=} columnNames
+ * @param {boolean=} isTable
+ */
+InjectedScript.RemoteObject = function(object, objectGroupName, forceValueType, generatePreview, columnNames, isTable)
+{
+    this.type = typeof object;
+    if (injectedScript.isPrimitiveValue(object) || object === null || forceValueType) {
+        // We don't send undefined values over JSON.
+        if (this.type !== "undefined")
+            this.value = object;
+
+        // Null object is object with 'null' subtype.
+        if (object === null)
+            this.subtype = "null";
+
+        // Provide user-friendly number values.
+        if (this.type === "number") {
+            this.description = toStringDescription(object);
+            // Override "value" property for values that can not be JSON-stringified.
+            switch (this.description) {
+            case "NaN":
+            case "Infinity":
+            case "-Infinity":
+            case "-0":
+                this.value = this.description;
+                break;
+            }
+        }
+
+        return;
+    }
+
+    object = /** @type {!Object} */ (object);
+
+    this.objectId = injectedScript._bind(object, objectGroupName);
+    var subtype = injectedScript._subtype(object);
+    if (subtype)
+        this.subtype = subtype;
+    var className = InjectedScriptHost.internalConstructorName(object);
+    if (className)
+        this.className = className;
+    this.description = injectedScript._describe(object);
+
+    if (generatePreview && (this.type === "object" || injectedScript._isHTMLAllCollection(object)))
+        this.preview = this._generatePreview(object, undefined, columnNames, isTable);
+}
+
+InjectedScript.RemoteObject.prototype = {
+    /**
+     * @param {!Object} object
+     * @param {?Array.<string>=} firstLevelKeys
+     * @param {?Array.<string>=} secondLevelKeys
+     * @param {boolean=} isTable
+     * @return {!RuntimeAgent.ObjectPreview} preview
+     */
+    _generatePreview: function(object, firstLevelKeys, secondLevelKeys, isTable)
+    {
+        var preview = { __proto__: null };
+        preview.lossless = true;
+        preview.overflow = false;
+        preview.properties = [];
+
+        var firstLevelKeysCount = firstLevelKeys ? firstLevelKeys.length : 0;
+
+        var propertiesThreshold = {
+            properties: isTable ? 1000 : max(5, firstLevelKeysCount),
+            indexes: isTable ? 1000 : max(100, firstLevelKeysCount)
+        };
+
+        try {
+            var descriptors = injectedScript._propertyDescriptors(object);
+
+            if (firstLevelKeys) {
+                var nameToDescriptors = { __proto__: null };
+                for (var i = 0; i < descriptors.length; ++i) {
+                    var descriptor = descriptors[i];
+                    nameToDescriptors["#" + descriptor.name] = descriptor;
+                }
+                descriptors = [];
+                for (var i = 0; i < firstLevelKeys.length; ++i)
+                    descriptors[i] = nameToDescriptors["#" + firstLevelKeys[i]];
+            }
+
+            this._appendPropertyDescriptors(preview, descriptors, propertiesThreshold, secondLevelKeys, isTable);
+            if (propertiesThreshold.indexes < 0 || propertiesThreshold.properties < 0)
+                return preview;
+
+            // Add internal properties to preview.
+            var internalProperties = InjectedScriptHost.getInternalProperties(object) || [];
+            for (var i = 0; i < internalProperties.length; ++i) {
+                internalProperties[i] = nullifyObjectProto(internalProperties[i]);
+                internalProperties[i].enumerable = true;
+            }
+            this._appendPropertyDescriptors(preview, internalProperties, propertiesThreshold, secondLevelKeys, isTable);
+
+        } catch (e) {
+            preview.lossless = false;
+        }
+
+        return preview;
+    },
+
+    /**
+     * @param {!RuntimeAgent.ObjectPreview} preview
+     * @param {!Array.<!Object>} descriptors
+     * @param {!Object} propertiesThreshold
+     * @param {?Array.<string>=} secondLevelKeys
+     * @param {boolean=} isTable
+     */
+    _appendPropertyDescriptors: function(preview, descriptors, propertiesThreshold, secondLevelKeys, isTable)
+    {
+        for (var i = 0; i < descriptors.length; ++i) {
+            if (propertiesThreshold.indexes < 0 || propertiesThreshold.properties < 0)
+                break;
+
+            var descriptor = descriptors[i];
+            if (!descriptor)
+                continue;
+            if (descriptor.wasThrown) {
+                preview.lossless = false;
+                continue;
+            }
+            if (!descriptor.enumerable && !descriptor.isOwn)
+                continue;
+
+            var name = descriptor.name;
+            if (name === "__proto__")
+                continue;
+            if (this.subtype === "array" && name === "length")
+                continue;
+
+            if (!("value" in descriptor)) {
+                preview.lossless = false;
+                this._appendPropertyPreview(preview, { name: name, type: "accessor", __proto__: null }, propertiesThreshold);
+                continue;
+            }
+
+            var value = descriptor.value;
+            if (value === null) {
+                this._appendPropertyPreview(preview, { name: name, type: "object", subtype: "null", value: "null", __proto__: null }, propertiesThreshold);
+                continue;
+            }
+
+            var type = typeof value;
+            if (!descriptor.enumerable && type === "function")
+                continue;
+            if (type === "undefined" && injectedScript._isHTMLAllCollection(value))
+                type = "object";
+
+            var maxLength = 100;
+            if (InjectedScript.primitiveTypes[type]) {
+                if (type === "string" && value.length > maxLength) {
+                    value = this._abbreviateString(value, maxLength, true);
+                    preview.lossless = false;
+                }
+                this._appendPropertyPreview(preview, { name: name, type: type, value: toStringDescription(value), __proto__: null }, propertiesThreshold);
+                continue;
+            }
+
+            var property = { name: name, type: type, __proto__: null };
+            var subtype = injectedScript._subtype(value);
+            if (subtype)
+                property.subtype = subtype;
+
+            if (secondLevelKeys === null || secondLevelKeys) {
+                var subPreview = this._generatePreview(value, secondLevelKeys || undefined, undefined, isTable);
+                property.valuePreview = subPreview;
+                if (!subPreview.lossless)
+                    preview.lossless = false;
+                if (subPreview.overflow)
+                    preview.overflow = true;
+            } else {
+                var description = "";
+                if (type !== "function")
+                    description = this._abbreviateString(/** @type {string} */ (injectedScript._describe(value)), maxLength, subtype === "regexp");
+                property.value = description;
+                preview.lossless = false;
+            }
+            this._appendPropertyPreview(preview, property, propertiesThreshold);
+        }
+    },
+
+    /**
+     * @param {!RuntimeAgent.ObjectPreview} preview
+     * @param {!Object} property
+     * @param {!Object} propertiesThreshold
+     */
+    _appendPropertyPreview: function(preview, property, propertiesThreshold)
+    {
+        if (toString(property.name >>> 0) === property.name)
+            propertiesThreshold.indexes--;
+        else
+            propertiesThreshold.properties--;
+        if (propertiesThreshold.indexes < 0 || propertiesThreshold.properties < 0) {
+            preview.overflow = true;
+            preview.lossless = false;
+        } else {
+            push(preview.properties, property);
+        }
+    },
+
+    /**
+     * @param {string} string
+     * @param {number} maxLength
+     * @param {boolean=} middle
+     * @return {string}
+     */
+    _abbreviateString: function(string, maxLength, middle)
+    {
+        if (string.length <= maxLength)
+            return string;
+        if (middle) {
+            var leftHalf = maxLength >> 1;
+            var rightHalf = maxLength - leftHalf - 1;
+            return string.substr(0, leftHalf) + "\u2026" + string.substr(string.length - rightHalf, rightHalf);
+        }
+        return string.substr(0, maxLength) + "\u2026";
+    },
+
+    __proto__: null
+}
+/**
+ * @constructor
+ * @param {number} ordinal
+ * @param {!Object} callFrame
+ * @param {number} asyncOrdinal
+ */
+InjectedScript.CallFrameProxy = function(ordinal, callFrame, asyncOrdinal)
+{
+    this.callFrameId = "{\"ordinal\":" + ordinal + ",\"injectedScriptId\":" + injectedScriptId + (asyncOrdinal ? ",\"asyncOrdinal\":" + asyncOrdinal : "") + "}";
+    this.functionName = (callFrame.type === "function" ? callFrame.functionName : "");
+    this.location = { scriptId: toString(callFrame.sourceID), lineNumber: callFrame.line, columnNumber: callFrame.column, __proto__: null };
+    this.scopeChain = this._wrapScopeChain(callFrame);
+    this.this = injectedScript._wrapObject(callFrame.thisObject, "backtrace");
+    if (callFrame.isAtReturn)
+        this.returnValue = injectedScript._wrapObject(callFrame.returnValue, "backtrace");
+}
+
+InjectedScript.CallFrameProxy.prototype = {
+    /**
+     * @param {!Object} callFrame
+     * @return {!Array.<!DebuggerAgent.Scope>}
+     */
+    _wrapScopeChain: function(callFrame)
+    {
+        var scopeChain = callFrame.scopeChain;
+        var scopeChainProxy = [];
+        for (var i = 0; i < scopeChain.length; ++i)
+            scopeChainProxy[i] = InjectedScript.CallFrameProxy._createScopeJson(callFrame.scopeType(i), scopeChain[i], "backtrace");
+        return scopeChainProxy;
+    },
+
+    __proto__: null
+}
+
+/**
+ * @param {number} scopeTypeCode
+ * @param {*} scopeObject
+ * @param {string} groupId
+ * @return {!DebuggerAgent.Scope}
+ */
+InjectedScript.CallFrameProxy._createScopeJson = function(scopeTypeCode, scopeObject, groupId)
+{
+    var GLOBAL_SCOPE = 0;
+    var LOCAL_SCOPE = 1;
+    var WITH_SCOPE = 2;
+    var CLOSURE_SCOPE = 3;
+    var CATCH_SCOPE = 4;
+
+    /** @type {!Object.<number, string>} */
+    var scopeTypeNames = { __proto__: null };
+    scopeTypeNames[GLOBAL_SCOPE] = "global";
+    scopeTypeNames[LOCAL_SCOPE] = "local";
+    scopeTypeNames[WITH_SCOPE] = "with";
+    scopeTypeNames[CLOSURE_SCOPE] = "closure";
+    scopeTypeNames[CATCH_SCOPE] = "catch";
+
+    return {
+        object: injectedScript._wrapObject(scopeObject, groupId),
+        type: /** @type {!DebuggerAgent.ScopeType} */ (scopeTypeNames[scopeTypeCode]),
+        __proto__: null
+    };
+}
+
+/**
+ * @constructor
+ * @param {!CommandLineAPIImpl} commandLineAPIImpl
+ * @param {?Object} callFrame
+ */
+function CommandLineAPI(commandLineAPIImpl, callFrame)
+{
+    /**
+     * @param {string} member
+     * @return {boolean}
+     */
+    function inScopeVariables(member)
+    {
+        if (!callFrame)
+            return false;
+
+        var scopeChain = callFrame.scopeChain;
+        for (var i = 0; i < scopeChain.length; ++i) {
+            if (member in scopeChain[i])
+                return true;
+        }
+        return false;
+    }
+
+    /**
+     * @param {string} name The name of the method for which a toString method should be generated.
+     * @return {function():string}
+     */
+    function customToStringMethod(name)
+    {
+        return function()
+        {
+            var funcArgsSyntax = "";
+            try {
+                var funcSyntax = "" + commandLineAPIImpl[name];
+                funcSyntax = funcSyntax.replace(/\n/g, " ");
+                funcSyntax = funcSyntax.replace(/^function[^\(]*\(([^\)]*)\).*$/, "$1");
+                funcSyntax = funcSyntax.replace(/\s*,\s*/g, ", ");
+                funcSyntax = funcSyntax.replace(/\bopt_(\w+)\b/g, "[$1]");
+                funcArgsSyntax = funcSyntax.trim();
+            } catch (e) {
+            }
+            return "function " + name + "(" + funcArgsSyntax + ") { [Command Line API] }";
+        };
+    }
+
+    for (var i = 0; i < CommandLineAPI.members_.length; ++i) {
+        var member = CommandLineAPI.members_[i];
+        if (member in inspectedWindow || inScopeVariables(member))
+            continue;
+
+        this[member] = bind(commandLineAPIImpl[member], commandLineAPIImpl);
+        this[member].toString = customToStringMethod(member);
+    }
+
+    for (var i = 0; i < 5; ++i) {
+        var member = "$" + i;
+        if (member in inspectedWindow || inScopeVariables(member))
+            continue;
+
+        this.__defineGetter__("$" + i, bind(commandLineAPIImpl._inspectedObject, commandLineAPIImpl, i));
+    }
+
+    this.$_ = injectedScript._lastResult;
+
+    this.__proto__ = null;
+}
+
+// NOTE: Please keep the list of API methods below snchronized to that in WebInspector.RuntimeModel!
+// NOTE: Argument names of these methods will be printed in the console, so use pretty names!
+/**
+ * @type {!Array.<string>}
+ * @const
+ */
+CommandLineAPI.members_ = [
+    "$", "$$", "$x", "dir", "dirxml", "keys", "values", "profile", "profileEnd",
+    "monitorEvents", "unmonitorEvents", "inspect", "copy", "clear", "getEventListeners",
+    "debug", "undebug", "monitor", "unmonitor", "table"
+];
+
+/**
+ * @constructor
+ */
+function CommandLineAPIImpl()
+{
+}
+
+CommandLineAPIImpl.prototype = {
+    /**
+     * @param {string} selector
+     * @param {!Node=} opt_startNode
+     * @return {*}
+     */
+    $: function (selector, opt_startNode)
+    {
+        if (this._canQuerySelectorOnNode(opt_startNode))
+            return opt_startNode.querySelector(selector);
+
+        return inspectedWindow.document.querySelector(selector);
+    },
+
+    /**
+     * @param {string} selector
+     * @param {!Node=} opt_startNode
+     * @return {*}
+     */
+    $$: function (selector, opt_startNode)
+    {
+        if (this._canQuerySelectorOnNode(opt_startNode))
+            return opt_startNode.querySelectorAll(selector);
+        return inspectedWindow.document.querySelectorAll(selector);
+    },
+
+    /**
+     * @param {!Node=} node
+     * @return {boolean}
+     */
+    _canQuerySelectorOnNode: function(node)
+    {
+        return !!node && InjectedScriptHost.subtype(node) === "node" && (node.nodeType === Node.ELEMENT_NODE || node.nodeType === Node.DOCUMENT_NODE || node.nodeType === Node.DOCUMENT_FRAGMENT_NODE);
+    },
+
+    /**
+     * @param {string} xpath
+     * @param {!Node=} opt_startNode
+     * @return {*}
+     */
+    $x: function(xpath, opt_startNode)
+    {
+        var doc = (opt_startNode && opt_startNode.ownerDocument) || inspectedWindow.document;
+        var result = doc.evaluate(xpath, opt_startNode || doc, null, XPathResult.ANY_TYPE, null);
+        switch (result.resultType) {
+        case XPathResult.NUMBER_TYPE:
+            return result.numberValue;
+        case XPathResult.STRING_TYPE:
+            return result.stringValue;
+        case XPathResult.BOOLEAN_TYPE:
+            return result.booleanValue;
+        default:
+            var nodes = [];
+            var node;
+            while (node = result.iterateNext())
+                push(nodes, node);
+            return nodes;
+        }
+    },
+
+    /**
+     * @return {*}
+     */
+    dir: function(var_args)
+    {
+        return InjectedScriptHost.callFunction(inspectedWindow.console.dir, inspectedWindow.console, slice(arguments));
+    },
+
+    /**
+     * @return {*}
+     */
+    dirxml: function(var_args)
+    {
+        return InjectedScriptHost.callFunction(inspectedWindow.console.dirxml, inspectedWindow.console, slice(arguments));
+    },
+
+    /**
+     * @return {!Array.<string>}
+     */
+    keys: function(object)
+    {
+        return Object.keys(object);
+    },
+
+    /**
+     * @return {!Array.<*>}
+     */
+    values: function(object)
+    {
+        var result = [];
+        for (var key in object)
+            push(result, object[key]);
+        return result;
+    },
+
+    /**
+     * @return {*}
+     */
+    profile: function(opt_title)
+    {
+        return InjectedScriptHost.callFunction(inspectedWindow.console.profile, inspectedWindow.console, slice(arguments));
+    },
+
+    /**
+     * @return {*}
+     */
+    profileEnd: function(opt_title)
+    {
+        return InjectedScriptHost.callFunction(inspectedWindow.console.profileEnd, inspectedWindow.console, slice(arguments));
+    },
+
+    /**
+     * @param {!Object} object
+     * @param {!Array.<string>|string=} opt_types
+     */
+    monitorEvents: function(object, opt_types)
+    {
+        if (!object || !object.addEventListener || !object.removeEventListener)
+            return;
+        var types = this._normalizeEventTypes(opt_types);
+        for (var i = 0; i < types.length; ++i) {
+            object.removeEventListener(types[i], this._logEvent, false);
+            object.addEventListener(types[i], this._logEvent, false);
+        }
+    },
+
+    /**
+     * @param {!Object} object
+     * @param {!Array.<string>|string=} opt_types
+     */
+    unmonitorEvents: function(object, opt_types)
+    {
+        if (!object || !object.addEventListener || !object.removeEventListener)
+            return;
+        var types = this._normalizeEventTypes(opt_types);
+        for (var i = 0; i < types.length; ++i)
+            object.removeEventListener(types[i], this._logEvent, false);
+    },
+
+    /**
+     * @param {*} object
+     * @return {*}
+     */
+    inspect: function(object)
+    {
+        return injectedScript._inspect(object);
+    },
+
+    copy: function(object)
+    {
+        var string;
+        if (injectedScript._subtype(object) === "node") {
+            string = object.outerHTML;
+        } else if (injectedScript.isPrimitiveValue(object)) {
+            string = toString(object);
+        } else {
+            try {
+                string = JSON.stringify(object, null, "  ");
+            } catch (e) {
+                string = toString(object);
+            }
+        }
+
+        var hints = { copyToClipboard: true, __proto__: null };
+        var remoteObject = injectedScript._wrapObject(string, "")
+        InjectedScriptHost.inspect(remoteObject, hints);
+    },
+
+    clear: function()
+    {
+        InjectedScriptHost.clearConsoleMessages();
+    },
+
+    /**
+     * @param {!Node} node
+     * @return {!{type: string, listener: function(), useCapture: boolean, remove: function()}|undefined}
+     */
+    getEventListeners: function(node)
+    {
+        var result = nullifyObjectProto(InjectedScriptHost.getEventListeners(node));
+        if (!result)
+            return result;
+        /** @this {{type: string, listener: function(), useCapture: boolean}} */
+        var removeFunc = function()
+        {
+            node.removeEventListener(this.type, this.listener, this.useCapture);
+        }
+        for (var type in result) {
+            var listeners = result[type];
+            for (var i = 0, listener; listener = listeners[i]; ++i) {
+                listener["type"] = type;
+                listener["remove"] = removeFunc;
+            }
+        }
+        return result;
+    },
+
+    debug: function(fn)
+    {
+        InjectedScriptHost.debugFunction(fn);
+    },
+
+    undebug: function(fn)
+    {
+        InjectedScriptHost.undebugFunction(fn);
+    },
+
+    monitor: function(fn)
+    {
+        InjectedScriptHost.monitorFunction(fn);
+    },
+
+    unmonitor: function(fn)
+    {
+        InjectedScriptHost.unmonitorFunction(fn);
+    },
+
+    table: function(data, opt_columns)
+    {
+        InjectedScriptHost.callFunction(inspectedWindow.console.table, inspectedWindow.console, slice(arguments));
+    },
+
+    /**
+     * @param {number} num
+     */
+    _inspectedObject: function(num)
+    {
+        return InjectedScriptHost.inspectedObject(num);
+    },
+
+    /**
+     * @param {!Array.<string>|string=} types
+     * @return {!Array.<string>}
+     */
+    _normalizeEventTypes: function(types)
+    {
+        if (typeof types === "undefined")
+            types = ["mouse", "key", "touch", "control", "load", "unload", "abort", "error", "select", "change", "submit", "reset", "focus", "blur", "resize", "scroll", "search", "devicemotion", "deviceorientation"];
+        else if (typeof types === "string")
+            types = [types];
+
+        var result = [];
+        for (var i = 0; i < types.length; ++i) {
+            if (types[i] === "mouse")
+                push(result, "mousedown", "mouseup", "click", "dblclick", "mousemove", "mouseover", "mouseout", "mousewheel");
+            else if (types[i] === "key")
+                push(result, "keydown", "keyup", "keypress", "textInput");
+            else if (types[i] === "touch")
+                push(result, "touchstart", "touchmove", "touchend", "touchcancel");
+            else if (types[i] === "control")
+                push(result, "resize", "scroll", "zoom", "focus", "blur", "select", "change", "submit", "reset");
+            else
+                push(result, types[i]);
+        }
+        return result;
+    },
+
+    /**
+     * @param {!Event} event
+     */
+    _logEvent: function(event)
+    {
+        inspectedWindow.console.log(event.type, event);
+    }
+}
+
+injectedScript._commandLineAPIImpl = new CommandLineAPIImpl();
+return injectedScript;
+})