Revert of [DevTools] Extract platform module.

Source/devtools/front_end/host/DOMExtension.js

Index: Source/devtools/front_end/host/DOMExtension.js
diff --git a/Source/devtools/front_end/host/DOMExtension.js b/Source/devtools/front_end/host/DOMExtension.js
new file mode 100644
index 0000000000000000000000000000000000000000..d22335c4777ef27c3f659ffc6382fc54088221e7
--- /dev/null
+++ b/Source/devtools/front_end/host/DOMExtension.js
@@ -0,0 +1,853 @@
+/*
+ * Copyright (C) 2007 Apple Inc.  All rights reserved.
+ * Copyright (C) 2012 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.
+ *
+ * Contains diff method based on Javascript Diff Algorithm By John Resig
+ * http://ejohn.org/files/jsdiff.js (released under the MIT license).
+ */
+
+/**
+ * @param {number} offset
+ * @param {string} stopCharacters
+ * @param {!Node} stayWithinNode
+ * @param {string=} direction
+ * @return {!Range}
+ */
+Node.prototype.rangeOfWord = function(offset, stopCharacters, stayWithinNode, direction)
+{
+    var startNode;
+    var startOffset = 0;
+    var endNode;
+    var endOffset = 0;
+
+    if (!stayWithinNode)
+        stayWithinNode = this;
+
+    if (!direction || direction === "backward" || direction === "both") {
+        var node = this;
+        while (node) {
+            if (node === stayWithinNode) {
+                if (!startNode)
+                    startNode = stayWithinNode;
+                break;
+            }
+
+            if (node.nodeType === Node.TEXT_NODE) {
+                var start = (node === this ? (offset - 1) : (node.nodeValue.length - 1));
+                for (var i = start; i >= 0; --i) {
+                    if (stopCharacters.indexOf(node.nodeValue[i]) !== -1) {
+                        startNode = node;
+                        startOffset = i + 1;
+                        break;
+                    }
+                }
+            }
+
+            if (startNode)
+                break;
+
+            node = node.traversePreviousNode(stayWithinNode);
+        }
+
+        if (!startNode) {
+            startNode = stayWithinNode;
+            startOffset = 0;
+        }
+    } else {
+        startNode = this;
+        startOffset = offset;
+    }
+
+    if (!direction || direction === "forward" || direction === "both") {
+        node = this;
+        while (node) {
+            if (node === stayWithinNode) {
+                if (!endNode)
+                    endNode = stayWithinNode;
+                break;
+            }
+
+            if (node.nodeType === Node.TEXT_NODE) {
+                var start = (node === this ? offset : 0);
+                for (var i = start; i < node.nodeValue.length; ++i) {
+                    if (stopCharacters.indexOf(node.nodeValue[i]) !== -1) {
+                        endNode = node;
+                        endOffset = i;
+                        break;
+                    }
+                }
+            }
+
+            if (endNode)
+                break;
+
+            node = node.traverseNextNode(stayWithinNode);
+        }
+
+        if (!endNode) {
+            endNode = stayWithinNode;
+            endOffset = stayWithinNode.nodeType === Node.TEXT_NODE ? stayWithinNode.nodeValue.length : stayWithinNode.childNodes.length;
+        }
+    } else {
+        endNode = this;
+        endOffset = offset;
+    }
+
+    var result = this.ownerDocument.createRange();
+    result.setStart(startNode, startOffset);
+    result.setEnd(endNode, endOffset);
+
+    return result;
+}
+
+/**
+ * @param {!Node=} stayWithin
+ * @return {?Node}
+ */
+Node.prototype.traverseNextTextNode = function(stayWithin)
+{
+    var node = this.traverseNextNode(stayWithin);
+    if (!node)
+        return null;
+
+    while (node && node.nodeType !== Node.TEXT_NODE)
+        node = node.traverseNextNode(stayWithin);
+
+    return node;
+}
+
+/**
+ * @param {number} offset
+ * @return {!{container: !Node, offset: number}}
+ */
+Node.prototype.rangeBoundaryForOffset = function(offset)
+{
+    var node = this.traverseNextTextNode(this);
+    while (node && offset > node.nodeValue.length) {
+        offset -= node.nodeValue.length;
+        node = node.traverseNextTextNode(this);
+    }
+    if (!node)
+        return { container: this, offset: 0 };
+    return { container: node, offset: offset };
+}
+
+/**
+ * @param {number|undefined} x
+ * @param {number|undefined} y
+ * @param {!Element=} relativeTo
+ */
+Element.prototype.positionAt = function(x, y, relativeTo)
+{
+    var shift = {x: 0, y: 0};
+    if (relativeTo)
+       shift = relativeTo.boxInWindow(this.ownerDocument.defaultView);
+
+    if (typeof x === "number")
+        this.style.setProperty("left", (shift.x + x) + "px");
+    else
+        this.style.removeProperty("left");
+
+    if (typeof y === "number")
+        this.style.setProperty("top", (shift.y + y) + "px");
+    else
+        this.style.removeProperty("top");
+}
+
+/**
+ * @return {boolean}
+ */
+Element.prototype.isScrolledToBottom = function()
+{
+    // This code works only for 0-width border.
+    // Both clientHeight and scrollHeight are rounded to integer values, so we tolerate
+    // one pixel error.
+    return Math.abs(this.scrollTop + this.clientHeight - this.scrollHeight) <= 1;
+}
+
+/**
+ * @param {!Node} fromNode
+ * @param {!Node} toNode
+ */
+function removeSubsequentNodes(fromNode, toNode)
+{
+    for (var node = fromNode; node && node !== toNode; ) {
+        var nodeToRemove = node;
+        node = node.nextSibling;
+        nodeToRemove.remove();
+    }
+}
+
+/**
+ * @constructor
+ * @param {!Size} minimum
+ * @param {?Size=} preferred
+ */
+function Constraints(minimum, preferred)
+{
+    /**
+     * @type {!Size}
+     */
+    this.minimum = minimum;
+
+    /**
+     * @type {!Size}
+     */
+    this.preferred = preferred || minimum;
+
+    if (this.minimum.width > this.preferred.width || this.minimum.height > this.preferred.height)
+        throw new Error("Minimum size is greater than preferred.");
+}
+
+/**
+ * @param {?Constraints} constraints
+ * @return {boolean}
+ */
+Constraints.prototype.isEqual = function(constraints)
+{
+    return !!constraints && this.minimum.isEqual(constraints.minimum) && this.preferred.isEqual(constraints.preferred);
+}
+
+/**
+ * @param {!Constraints|number} value
+ * @return {!Constraints}
+ */
+Constraints.prototype.widthToMax = function(value)
+{
+    if (typeof value === "number")
+        return new Constraints(this.minimum.widthToMax(value), this.preferred.widthToMax(value));
+    return new Constraints(this.minimum.widthToMax(value.minimum), this.preferred.widthToMax(value.preferred));
+}
+
+/**
+ * @param {!Constraints|number} value
+ * @return {!Constraints}
+ */
+Constraints.prototype.addWidth = function(value)
+{
+    if (typeof value === "number")
+        return new Constraints(this.minimum.addWidth(value), this.preferred.addWidth(value));
+    return new Constraints(this.minimum.addWidth(value.minimum), this.preferred.addWidth(value.preferred));
+}
+
+/**
+ * @param {!Constraints|number} value
+ * @return {!Constraints}
+ */
+Constraints.prototype.heightToMax = function(value)
+{
+    if (typeof value === "number")
+        return new Constraints(this.minimum.heightToMax(value), this.preferred.heightToMax(value));
+    return new Constraints(this.minimum.heightToMax(value.minimum), this.preferred.heightToMax(value.preferred));
+}
+
+/**
+ * @param {!Constraints|number} value
+ * @return {!Constraints}
+ */
+Constraints.prototype.addHeight = function(value)
+{
+    if (typeof value === "number")
+        return new Constraints(this.minimum.addHeight(value), this.preferred.addHeight(value));
+    return new Constraints(this.minimum.addHeight(value.minimum), this.preferred.addHeight(value.preferred));
+}
+
+/**
+ * @param {!Event} event
+ * @return {boolean}
+ */
+Element.prototype.containsEventPoint = function(event)
+{
+    var box = this.getBoundingClientRect();
+    return box.left < event.x  && event.x < box.right &&
+           box.top < event.y && event.y < box.bottom;
+}
+
+/**
+ * @param {!Array.<string>} nameArray
+ * @return {?Node}
+ */
+Node.prototype.enclosingNodeOrSelfWithNodeNameInArray = function(nameArray)
+{
+    for (var node = this; node && node !== this.ownerDocument; node = node.parentNodeOrShadowHost()) {
+        for (var i = 0; i < nameArray.length; ++i) {
+            if (node.nodeName.toLowerCase() === nameArray[i].toLowerCase())
+                return node;
+        }
+    }
+    return null;
+}
+
+/**
+ * @param {string} nodeName
+ * @return {?Node}
+ */
+Node.prototype.enclosingNodeOrSelfWithNodeName = function(nodeName)
+{
+    return this.enclosingNodeOrSelfWithNodeNameInArray([nodeName]);
+}
+
+/**
+ * @param {string} className
+ * @param {!Element=} stayWithin
+ * @return {?Element}
+ */
+Node.prototype.enclosingNodeOrSelfWithClass = function(className, stayWithin)
+{
+    for (var node = this; node && node !== stayWithin && node !== this.ownerDocument; node = node.parentNodeOrShadowHost()) {
+        if (node.nodeType === Node.ELEMENT_NODE && node.classList.contains(className))
+            return /** @type {!Element} */ (node);
+    }
+    return null;
+}
+
+/**
+ * @return {?Element}
+ */
+Node.prototype.parentElementOrShadowHost = function()
+{
+    var node = this.parentNode;
+    if (!node)
+        return null;
+    if (node.nodeType === Node.ELEMENT_NODE)
+        return /** @type {!Element} */ (node);
+    if (node.nodeType === Node.DOCUMENT_FRAGMENT_NODE)
+        return /** @type {!Element} */ (node.host);
+    return null;
+}
+
+/**
+ * @return {?Node}
+ */
+Node.prototype.parentNodeOrShadowHost = function()
+{
+    return this.parentNode || this.host || null;
+}
+
+/**
+ * @param {string} query
+ * @return {?Node}
+ */
+Element.prototype.query = function(query)
+{
+    return this.ownerDocument.evaluate(query, this, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
+}
+
+Element.prototype.removeChildren = function()
+{
+    if (this.firstChild)
+        this.textContent = "";
+}
+
+/**
+ * @return {boolean}
+ */
+Element.prototype.isInsertionCaretInside = function()
+{
+    var selection = window.getSelection();
+    if (!selection.rangeCount || !selection.isCollapsed)
+        return false;
+    var selectionRange = selection.getRangeAt(0);
+    return selectionRange.startContainer.isSelfOrDescendant(this);
+}
+
+/**
+ * @param {string} tagName
+ * @return {!Element}
+ * @suppressGlobalPropertiesCheck
+ */
+function createElement(tagName)
+{
+    return document.createElement(tagName);
+}
+
+/**
+ * @param {number|string} data
+ * @return {!Text}
+ * @suppressGlobalPropertiesCheck
+ */
+function createTextNode(data)
+{
+    return document.createTextNode(data);
+}
+
+/**
+ * @param {string} elementName
+ * @param {string=} className
+ * @return {!Element}
+ */
+Document.prototype.createElementWithClass = function(elementName, className)
+{
+    var element = this.createElement(elementName);
+    if (className)
+        element.className = className;
+    return element;
+}
+
+/**
+ * @param {string} elementName
+ * @param {string=} className
+ * @return {!Element}
+ * @suppressGlobalPropertiesCheck
+ */
+function createElementWithClass(elementName, className)
+{
+    return document.createElementWithClass(elementName, className);
+}
+
+/**
+ * @return {!DocumentFragment}
+ * @suppressGlobalPropertiesCheck
+ */
+function createDocumentFragment()
+{
+    return document.createDocumentFragment();
+}
+
+/**
+ * @param {string} elementName
+ * @param {string=} className
+ * @return {!Element}
+ */
+Element.prototype.createChild = function(elementName, className)
+{
+    var element = this.ownerDocument.createElementWithClass(elementName, className);
+    this.appendChild(element);
+    return element;
+}
+
+DocumentFragment.prototype.createChild = Element.prototype.createChild;
+
+/**
+ * @param {string} text
+ * @return {!Text}
+ */
+Element.prototype.createTextChild = function(text)
+{
+    var element = this.ownerDocument.createTextNode(text);
+    this.appendChild(element);
+    return element;
+}
+
+DocumentFragment.prototype.createTextChild = Element.prototype.createTextChild;
+
+/**
+ * @param {...string} var_args
+ */
+Element.prototype.createTextChildren = function(var_args)
+{
+    for (var i = 0, n = arguments.length; i < n; ++i)
+        this.createTextChild(arguments[i]);
+}
+
+DocumentFragment.prototype.createTextChildren = Element.prototype.createTextChildren;
+
+/**
+ * @param {...!Element} var_args
+ */
+Element.prototype.appendChildren = function(var_args)
+{
+    for (var i = 0, n = arguments.length; i < n; ++i)
+        this.appendChild(arguments[i]);
+}
+
+/**
+ * @return {number}
+ */
+Element.prototype.totalOffsetLeft = function()
+{
+    return this.totalOffset().left;
+}
+
+/**
+ * @return {number}
+ */
+Element.prototype.totalOffsetTop = function()
+{
+    return this.totalOffset().top;
+}
+
+/**
+ * @return {!{left: number, top: number}}
+ */
+Element.prototype.totalOffset = function()
+{
+    var rect = this.getBoundingClientRect();
+    return { left: rect.left, top: rect.top };
+}
+
+/**
+ * @return {!{left: number, top: number}}
+ */
+Element.prototype.scrollOffset = function()
+{
+    var curLeft = 0;
+    var curTop = 0;
+    for (var element = this; element; element = element.scrollParent) {
+        curLeft += element.scrollLeft;
+        curTop += element.scrollTop;
+    }
+    return { left: curLeft, top: curTop };
+}
+
+/**
+ * @constructor
+ * @param {number=} x
+ * @param {number=} y
+ * @param {number=} width
+ * @param {number=} height
+ */
+function AnchorBox(x, y, width, height)
+{
+    this.x = x || 0;
+    this.y = y || 0;
+    this.width = width || 0;
+    this.height = height || 0;
+}
+
+/**
+ * @param {!AnchorBox} box
+ * @return {!AnchorBox}
+ */
+AnchorBox.prototype.relativeTo = function(box)
+{
+    return new AnchorBox(
+        this.x - box.x, this.y - box.y, this.width, this.height);
+}
+
+/**
+ * @param {!Element} element
+ * @return {!AnchorBox}
+ */
+AnchorBox.prototype.relativeToElement = function(element)
+{
+    return this.relativeTo(element.boxInWindow(element.ownerDocument.defaultView));
+}
+
+/**
+ * @param {?AnchorBox} anchorBox
+ * @return {boolean}
+ */
+AnchorBox.prototype.equals = function(anchorBox)
+{
+    return !!anchorBox && this.x === anchorBox.x && this.y === anchorBox.y && this.width === anchorBox.width && this.height === anchorBox.height;
+}
+
+/**
+ * @param {!Window} targetWindow
+ * @return {!AnchorBox}
+ */
+Element.prototype.offsetRelativeToWindow = function(targetWindow)
+{
+    var elementOffset = new AnchorBox();
+    var curElement = this;
+    var curWindow = this.ownerDocument.defaultView;
+    while (curWindow && curElement) {
+        elementOffset.x += curElement.totalOffsetLeft();
+        elementOffset.y += curElement.totalOffsetTop();
+        if (curWindow === targetWindow)
+            break;
+
+        curElement = curWindow.frameElement;
+        curWindow = curWindow.parent;
+    }
+
+    return elementOffset;
+}
+
+/**
+ * @param {!Window=} targetWindow
+ * @return {!AnchorBox}
+ */
+Element.prototype.boxInWindow = function(targetWindow)
+{
+    targetWindow = targetWindow || this.ownerDocument.defaultView;
+
+    var anchorBox = this.offsetRelativeToWindow(window);
+    anchorBox.width = Math.min(this.offsetWidth, window.innerWidth - anchorBox.x);
+    anchorBox.height = Math.min(this.offsetHeight, window.innerHeight - anchorBox.y);
+
+    return anchorBox;
+}
+
+/**
+ * @param {string} text
+ */
+Element.prototype.setTextAndTitle = function(text)
+{
+    this.textContent = text;
+    this.title = text;
+}
+
+KeyboardEvent.prototype.__defineGetter__("data", function()
+{
+    // Emulate "data" attribute from DOM 3 TextInput event.
+    // See http://www.w3.org/TR/DOM-Level-3-Events/#events-Events-TextEvent-data
+    switch (this.type) {
+        case "keypress":
+            if (!this.ctrlKey && !this.metaKey)
+                return String.fromCharCode(this.charCode);
+            else
+                return "";
+        case "keydown":
+        case "keyup":
+            if (!this.ctrlKey && !this.metaKey && !this.altKey)
+                return String.fromCharCode(this.which);
+            else
+                return "";
+    }
+});
+
+/**
+ * @param {boolean=} preventDefault
+ */
+Event.prototype.consume = function(preventDefault)
+{
+    this.stopImmediatePropagation();
+    if (preventDefault)
+        this.preventDefault();
+    this.handled = true;
+}
+
+/**
+ * @param {number=} start
+ * @param {number=} end
+ * @return {!Text}
+ */
+Text.prototype.select = function(start, end)
+{
+    start = start || 0;
+    end = end || this.textContent.length;
+
+    if (start < 0)
+        start = end + start;
+
+    var selection = this.ownerDocument.defaultView.getSelection();
+    selection.removeAllRanges();
+    var range = this.ownerDocument.createRange();
+    range.setStart(this, start);
+    range.setEnd(this, end);
+    selection.addRange(range);
+    return this;
+}
+
+/**
+ * @return {?number}
+ */
+Element.prototype.selectionLeftOffset = function()
+{
+    // Calculate selection offset relative to the current element.
+
+    var selection = window.getSelection();
+    if (!selection.containsNode(this, true))
+        return null;
+
+    var leftOffset = selection.anchorOffset;
+    var node = selection.anchorNode;
+
+    while (node !== this) {
+        while (node.previousSibling) {
+            node = node.previousSibling;
+            leftOffset += node.textContent.length;
+        }
+        node = node.parentNodeOrShadowHost();
+    }
+
+    return leftOffset;
+}
+
+/**
+ * @return {string}
+ */
+Node.prototype.deepTextContent = function()
+{
+    var node = this.traverseNextTextNode(this);
+    var result = [];
+    var nonTextTags = { "STYLE": 1, "SCRIPT": 1 };
+    while (node) {
+        if (!nonTextTags[node.parentElement.nodeName])
+            result.push(node.textContent);
+        node = node.traverseNextTextNode(this);
+    }
+    return result.join("");
+}
+
+/**
+ * @param {?Node} node
+ * @return {boolean}
+ */
+Node.prototype.isAncestor = function(node)
+{
+    if (!node)
+        return false;
+
+    var currentNode = node.parentNodeOrShadowHost();
+    while (currentNode) {
+        if (this === currentNode)
+            return true;
+        currentNode = currentNode.parentNodeOrShadowHost();
+    }
+    return false;
+}
+
+/**
+ * @param {?Node} descendant
+ * @return {boolean}
+ */
+Node.prototype.isDescendant = function(descendant)
+{
+    return !!descendant && descendant.isAncestor(this);
+}
+
+/**
+ * @param {?Node} node
+ * @return {boolean}
+ */
+Node.prototype.isSelfOrAncestor = function(node)
+{
+    return !!node && (node === this || this.isAncestor(node));
+}
+
+/**
+ * @param {?Node} node
+ * @return {boolean}
+ */
+Node.prototype.isSelfOrDescendant = function(node)
+{
+    return !!node && (node === this || this.isDescendant(node));
+}
+
+/**
+ * @param {!Node=} stayWithin
+ * @return {?Node}
+ */
+Node.prototype.traverseNextNode = function(stayWithin)
+{
+    if (this.firstChild)
+        return this.firstChild;
+
+    if (this.shadowRoot)
+        return this.shadowRoot;
+
+    if (stayWithin && this === stayWithin)
+        return null;
+
+    var node = this.nextSibling;
+    if (node)
+        return node;
+
+    node = this;
+    while (node && !node.nextSibling && (!stayWithin || !node.parentNodeOrShadowHost() || node.parentNodeOrShadowHost() !== stayWithin))
+        node = node.parentNodeOrShadowHost();
+    if (!node)
+        return null;
+
+    return node.nextSibling;
+}
+
+/**
+ * @param {!Node=} stayWithin
+ * @return {?Node}
+ */
+Node.prototype.traversePreviousNode = function(stayWithin)
+{
+    if (stayWithin && this === stayWithin)
+        return null;
+    var node = this.previousSibling;
+    while (node && node.lastChild)
+        node = node.lastChild;
+    if (node)
+        return node;
+    return this.parentNodeOrShadowHost();
+}
+
+/**
+ * @param {*} text
+ * @param {string=} placeholder
+ * @return {boolean} true if was truncated
+ */
+Node.prototype.setTextContentTruncatedIfNeeded = function(text, placeholder)
+{
+    // Huge texts in the UI reduce rendering performance drastically.
+    // Moreover, Blink/WebKit uses <unsigned short> internally for storing text content
+    // length, so texts longer than 65535 are inherently displayed incorrectly.
+    const maxTextContentLength = 65535;
+
+    if (typeof text === "string" && text.length > maxTextContentLength) {
+        this.textContent = typeof placeholder === "string" ? placeholder : text.trimEnd(maxTextContentLength);
+        return true;
+    }
+
+    this.textContent = text;
+    return false;
+}
+
+/**
+ * @return {?Node}
+ */
+Event.prototype.deepElementFromPoint = function()
+{
+    // 1. climb to the component root.
+    var node = this.target;
+    while (node && node.nodeType !== Node.DOCUMENT_FRAGMENT_NODE && node.nodeType !== Node.DOCUMENT_NODE)
+        node = node.parentNode;
+
+    if (!node)
+        return null;
+
+    // 2. Find deepest node by coordinates.
+    node = node.elementFromPoint(this.pageX, this.pageY);
+    while (node && node.shadowRoot)
+        node = node.shadowRoot.elementFromPoint(this.pageX, this.pageY);
+    return node;
+}
+
+/**
+ * @param {number} x
+ * @param {number} y
+ * @return {?Node}
+ */
+Document.prototype.deepElementFromPoint = function(x, y)
+{
+    var node = this.elementFromPoint(x, y);
+    while (node && node.shadowRoot)
+        node = node.shadowRoot.elementFromPoint(x, y);
+    return node;
+}
+
+/**
+ * @return {boolean}
+ */
+function isEnterKey(event) {
+    // Check if in IME.
+    return event.keyCode !== 229 && event.keyIdentifier === "Enter";
+}
+
+function consumeEvent(e)
+{
+    e.consume();
+}