DevTools: support live coverage

third_party/WebKit/LayoutTests/inspector/coverage/coverage-test.js

 function initialize_CoverageTests() {
 
 InspectorTest.preloadModule("coverage");
 
 InspectorTest.startCoverage = function()
 {
     UI.viewManager.showView("coverage");
     var coverageView = self.runtime.sharedInstance(Coverage.CoverageView);
     coverageView._startRecording();
 }
 
 InspectorTest.stopCoverage = function()
 {
     var coverageView = self.runtime.sharedInstance(Coverage.CoverageView);
     return coverageView._stopRecording();
 }
 
 InspectorTest.sourceDecorated = async function(source)
 {
     await UI.inspectorView.showPanel("sources");
-    var decoratePromise = InspectorTest.addSnifferPromise(Coverage.CoverageView.LineDecorator.prototype, "decorate");
+    var decoratePromise = InspectorTest.addSnifferPromise(Coverage.CoverageView.LineDecorator.prototype, "_innerDecorate");
     var sourceFrame = await new Promise(fulfill => InspectorTest.showScriptSource(source, fulfill));
     await decoratePromise;
     return sourceFrame;
 }
 
 InspectorTest.dumpDecorations = async function(source)
 {
     var sourceFrame = await InspectorTest.sourceDecorated(source);
     InspectorTest.dumpDecorationsInSourceFrame(sourceFrame);
 }
 
 InspectorTest.findCoverageNodeForURL = function(url)
 {
     var coverageListView = self.runtime.sharedInstance(Coverage.CoverageView)._listView;
     var rootNode = coverageListView._dataGrid.rootNode();
     for (var child of rootNode.children) {
       if (child._coverageInfo.url().endsWith(url))
         return child;
     }
     return null;
 }
 
 InspectorTest.dumpDecorationsInSourceFrame = function(sourceFrame)
 {
-    var markerMap = new Map([['used', '+'], ['unused', '-'], ['mixed', '*']]);
+    var markerMap = new Map([['used', '+'], ['unused', '-']]);
 
     var codeMirror = sourceFrame.textEditor.codeMirror();
     for (var line = 0; line < codeMirror.lineCount(); ++line) {
         var text = codeMirror.getLine(line);
         var markerType = ' ';
         var lineInfo = codeMirror.lineInfo(line);
         if (!lineInfo)
             continue;
         var gutterElement = lineInfo.gutterMarkers && lineInfo.gutterMarkers['CodeMirror-gutter-coverage'];
         if (gutterElement) {
             var markerClass = /^text-editor-coverage-(\w*)-marker$/.exec(gutterElement.classList)[1];
             markerType = markerMap.get(markerClass) || gutterElement.classList;
         }
         InspectorTest.addResult(`${line}: ${markerType} ${text}`);
     }
 }
 
 
 }