DevTools: Decouple debugger model from UI entities

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

 var initialize_DebuggerTest = function() {
 
 InspectorTest.startDebuggerTest = function(callback, quiet)
 {
     console.assert(WebInspector.debuggerModel.debuggerEnabled(), "Debugger has to be enabled");
     if (quiet !== undefined)
         InspectorTest._quiet = quiet;
     WebInspector.inspectorView.showPanel("sources");
 
     InspectorTest.addSniffer(WebInspector.debuggerModel, "_pausedScript", InspectorTest._pausedScript, true);
@@ skipping 398 matching lines @@
 {
     var scripts = [];
     for (var scriptId in WebInspector.debuggerModel._scripts) {
         var script = WebInspector.debuggerModel._scripts[scriptId];
         if (!filter || filter(script))
             scripts.push(script);
     }
     return scripts;
 };
 
-InspectorTest.createScriptMock = function(url, startLine, startColumn, isContentScript, source)
+InspectorTest.createScriptMock = function(url, startLine, startColumn, isContentScript, source, target, preRegisterCallback)
 {
+    target = target || WebInspector.targetManager.mainTarget();
     var scriptId = ++InspectorTest._lastScriptId;
     var lineCount = source.lineEndings().length;
     var endLine = startLine + lineCount - 1;
     var endColumn = lineCount === 1 ? startColumn + source.length : source.length - source.lineEndings()[lineCount - 2];
     var hasSourceURL = !!source.match(/\/\/#\ssourceURL=\s*(\S*?)\s*$/m) || !!source.match(/\/\/@\ssourceURL=\s*(\S*?)\s*$/m);
-    var script = new WebInspector.Script(WebInspector.targetManager.mainTarget(), scriptId, url, startLine, startColumn, endLine, endColumn, isContentScript, null, hasSourceURL);
+    var script = new WebInspector.Script(target, scriptId, url, startLine, startColumn, endLine, endColumn, isContentScript, null, hasSourceURL);
     script.requestContent = function(callback)
     {
         var trimmedSource = WebInspector.Script._trimSourceURLComment(source);
         callback(trimmedSource, false, "text/javascript");
     };
-    WebInspector.debuggerModel._registerScript(script);
+    if (preRegisterCallback)
+        preRegisterCallback(script);
+    target.debuggerModel._registerScript(script);
     return script;
 };
 
 InspectorTest._lastScriptId = 0;
 
 InspectorTest.checkRawLocation = function(script, lineNumber, columnNumber, location)
 {
     InspectorTest.assertEquals(script.scriptId, location.scriptId, "Incorrect scriptId");
     InspectorTest.assertEquals(lineNumber, location.lineNumber, "Incorrect lineNumber");
     InspectorTest.assertEquals(columnNumber, location.columnNumber, "Incorrect columnNumber");
@@ skipping 10 matching lines @@
 InspectorTest.scriptFormatter = function()
 {
     var editorActions = WebInspector.moduleManager.instances(WebInspector.SourcesView.EditorAction);
     for (var i = 0; i < editorActions.length; ++i) {
         if (editorActions[i] instanceof WebInspector.ScriptFormatterEditorAction)
             return editorActions[i];
     }
 };
 
 };