[DevTools] Extract platform module.

Source/devtools/front_end/platform/DOMExtension.js

 /*
  * 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.
@@ skipping 185 matching lines @@
 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;
 }
 
@@ skipping 554 matching lines @@
  */
 function isEnterKey(event) {
     // Check if in IME.
     return event.keyCode !== 229 && event.keyIdentifier === "Enter";
 }
 
 function consumeEvent(e)
 {
     e.consume();
 }