DevTools: remove illusionary caching from String.prototype.lineEndings

third_party/WebKit/LayoutTests/http/tests/inspector/debugger-test.js

 function scheduleTestFunction()
 {
     setTimeout(testFunction, 0);
 }
 
 var initialize_DebuggerTest = function() {
 
 InspectorTest.preloadPanel("sources");
 
 InspectorTest.startDebuggerTest = function(callback, quiet)
@@ skipping 496 matching lines @@
             scripts.push(script);
     }
     return scripts;
 };
 
 InspectorTest.createScriptMock = function(url, startLine, startColumn, isContentScript, source, target, preRegisterCallback)
 {
     target = target || WebInspector.targetManager.mainTarget();
     var debuggerModel = WebInspector.DebuggerModel.fromTarget(target);
     var scriptId = ++InspectorTest._lastScriptId + "";
-    var lineCount = source.lineEndings().length;
+    var lineCount = source.computeLineEndings().length;
     var endLine = startLine + lineCount - 1;
-    var endColumn = lineCount === 1 ? startColumn + source.length : source.length - source.lineEndings()[lineCount - 2];
+    var endColumn = lineCount === 1 ? startColumn + source.length : source.length - source.computeLineEndings()[lineCount - 2];
     var hasSourceURL = !!source.match(/\/\/#\ssourceURL=\s*(\S*?)\s*$/m) || !!source.match(/\/\/@\ssourceURL=\s*(\S*?)\s*$/m);
     var script = new WebInspector.Script(debuggerModel, scriptId, url, startLine, startColumn, endLine, endColumn, 0, "", isContentScript, false, false, undefined, hasSourceURL);
     script.requestContent = function()
     {
         var trimmedSource = WebInspector.Script._trimSourceURLComment(source);
         return Promise.resolve(trimmedSource);
     };
     if (preRegisterCallback)
         preRegisterCallback(script);
     debuggerModel._registerScript(script);
@@ skipping 49 matching lines @@
     var listItem = threadsPane._debuggerModelToListItems.get(WebInspector.DebuggerModel.fromTarget(target));
     threadsPane._onListItemClick(listItem);
 }
 
 InspectorTest.evaluateOnCurrentCallFrame = function(code)
 {
     return new Promise(succ => InspectorTest.debuggerModel.evaluateOnSelectedCallFrame(code, "console", false, true, false, false, InspectorTest.safeWrap(succ)));
 }
 
 };