DevTools: remove illusionary caching from String.prototype.lineEndings

third_party/WebKit/Source/devtools/front_end/sources/JavaScriptBreakpointsSidebarPane.js

 // Copyright (c) 2015 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.
 
 /**
  * @constructor
  * @extends {WebInspector.SidebarPane}
  * @param {!WebInspector.BreakpointManager} breakpointManager
  * @param {function(!WebInspector.UISourceCode, number=, number=, boolean=)} showSourceLineDelegate
  */
@@ skipping 71 matching lines @@
         var snippetElement = element.createChild("div", "source-text monospace");
 
         /**
          * @param {?string} content
          * @this {WebInspector.JavaScriptBreakpointsSidebarPane}
          */
         function didRequestContent(content)
         {
             var lineNumber = uiLocation.lineNumber
             var columnNumber = uiLocation.columnNumber;
-            var contentString = new String(content);
-            if (lineNumber < contentString.lineCount()) {
-                var lineText = contentString.lineAt(lineNumber);
+            var text = new WebInspector.Text(content || "");
+            if (lineNumber < text.lineCount()) {
+                var lineText = text.lineAt(lineNumber);
                 var maxSnippetLength = 200;
                 var snippetStartIndex = columnNumber > 100 ? columnNumber : 0;
                 snippetElement.textContent = lineText.substr(snippetStartIndex).trimEnd(maxSnippetLength);
             }
             this.didReceiveBreakpointLineForTest(uiLocation.uiSourceCode);
         }
 
         uiLocation.uiSourceCode.requestContent().then(didRequestContent.bind(this));
 
         element._data = uiLocation;
@@ skipping 146 matching lines @@
         this.listElement.removeChildren();
         if (this.listElement.parentElement) {
             this.element.removeChild(this.listElement);
             this.element.appendChild(this.emptyElement);
         }
         this._items.clear();
     },
 
     __proto__: WebInspector.SidebarPane.prototype
 }