Files.app: Extract the TextMeasure class to a new file.

chrome/browser/resources/file_manager/js/file_manager.js

Index: chrome/browser/resources/file_manager/js/file_manager.js
diff --git a/chrome/browser/resources/file_manager/js/file_manager.js b/chrome/browser/resources/file_manager/js/file_manager.js
index bab9f52f63461b1926f4842ff5da24d03234bd5a..eca548ba91b6bb62dd64f189c2207d8d4ba320dd 100644
--- a/chrome/browser/resources/file_manager/js/file_manager.js
+++ b/chrome/browser/resources/file_manager/js/file_manager.js
@@ -70,50 +70,6 @@ var DialogType = {
 };
 
 /**
- * TextMeasure constructor.
- *
- * TextMeasure is a measure for text that returns the width of text.  This
- * class has a dummy span element. When measuring the width of text, it sets
- * the text to the element and obtains the element's size by
- * getBoundingClientRect.
- *
- * @constructor
- * @param {HTMLElement} element Element that has styles of measured text. The
- *     width of text is mesures like as it is rendered in this element.
- */
-var TextMeasure = function(element) {
-  var doc = element.ownerDocument;
-  this.dummySpan_ = doc.createElement('span');
-  this.dummySpan_ = doc.getElementsByTagName('body')[0].
-                        appendChild(this.dummySpan_);
-  this.dummySpan_.style.position = 'absolute';
-  this.dummySpan_.style.visibility = 'hidden';
-  var styles = window.getComputedStyle(element, '');
-  var stylesToBeCopied = [
-    'fontSize',
-    'fontStyle',
-    'fontWeight',
-    'fontFamily',
-    'letterSpacing'
-  ];
-  for (var i = 0; i < stylesToBeCopied.length; i++) {
-    this.dummySpan_.style[stylesToBeCopied[i]] = styles[stylesToBeCopied[i]];
-  }
-};
-
-/**
- * Measures the widht of text.
- *
- * @param {string} text Text that is measured the width.
- * @return {number} Width of the specified text.
- */
-TextMeasure.prototype.getWidth = function(text) {
-  this.dummySpan_.innerText = text;
-  var rect = this.dummySpan_.getBoundingClientRect();
-  return rect ? rect.width : 0;
-};
-
-/**
  * @param {string} type Dialog type.
  * @return {boolean} Whether the type is modal.
  */