DevTools: carefully cleanup script UISourceCodes

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 556 matching lines @@
     }
 };
 
 InspectorTest.setQuiet = function(quiet)
 {
     InspectorTest._quiet = quiet;
 };
 
 InspectorTest.queryScripts = function(filter)
 {
-    var scripts = [];
-    for (var scriptId in InspectorTest.debuggerModel._scripts) {
-        var script = InspectorTest.debuggerModel._scripts[scriptId];
-        if (!filter || filter(script))
-            scripts.push(script);
-    }
-    return scripts;
+    var scripts = InspectorTest.debuggerModel.scripts();
+    return filter ? scripts.filter(filter) : scripts;
 };
 
 InspectorTest.createScriptMock = function(url, startLine, startColumn, isContentScript, source, target, preRegisterCallback)
 {
     target = target || SDK.targetManager.mainTarget();
     var debuggerModel = target.model(SDK.DebuggerModel);
     var scriptId = ++InspectorTest._lastScriptId + "";
     var lineCount = source.computeLineEndings().length;
     var endLine = startLine + lineCount - 1;
     var endColumn = lineCount === 1 ? startColumn + source.length : source.length - source.computeLineEndings()[lineCount - 2];
@@ skipping 136 matching lines @@
     var bookmark = bookmarks[index];
     if (bookmark) {
         bookmark[Sources.JavaScriptSourceFrame.BreakpointDecoration._elementSymbolForTest].click();
     } else {
         InspectorTest.addResult(`Could not click on Javascript breakpoint - lineNumber: ${lineNumber}, index: ${index}`);
         next();
     }
 }
 
 };