DevTools: use target-based model accessors only.

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

 var initialize_DebuggerTest = function() {
 
 InspectorTest.preloadPanel("sources");
 
 InspectorTest.startDebuggerTest = function(callback, quiet)
 {
-    console.assert(WebInspector.debuggerModel.debuggerEnabled(), "Debugger has to be enabled");
+    console.assert(InspectorTest.debuggerModel.debuggerEnabled(), "Debugger has to be enabled");
     if (quiet !== undefined)
         InspectorTest._quiet = quiet;
     WebInspector.SourcesPanel.show();
 
-    InspectorTest.addSniffer(WebInspector.debuggerModel, "_pausedScript", InspectorTest._pausedScript, true);
-    InspectorTest.addSniffer(WebInspector.debuggerModel, "_resumedScript", InspectorTest._resumedScript, true);
+    InspectorTest.addSniffer(InspectorTest.debuggerModel, "_pausedScript", InspectorTest._pausedScript, true);
+    InspectorTest.addSniffer(InspectorTest.debuggerModel, "_resumedScript", InspectorTest._resumedScript, true);
     InspectorTest.safeWrap(callback)();
 };
 
 InspectorTest.completeDebuggerTest = function()
 {
     WebInspector.breakpointManager.setBreakpointsActive(true);
     InspectorTest.resumeExecution(InspectorTest.completeTest.bind(InspectorTest));
 };
 
 (function() {
@@ skipping 222 matching lines @@
 InspectorTest.captureStackTraceIntoString = function(callFrames, asyncStackTrace, options)
 {
     var results = [];
     options = options || {};
 
     function printCallFrames(callFrames)
     {
         var printed = 0;
         for (var i = 0; i < callFrames.length; i++) {
             var frame = callFrames[i];
-            var script = WebInspector.debuggerModel.scriptForId(frame.location().scriptId);
+            var script = InspectorTest.debuggerModel.scriptForId(frame.location().scriptId);
             var isFramework = WebInspector.BlackboxSupport.isBlackboxedURL(script.sourceURL);
             if (options.dropFrameworkCallFrames && isFramework)
                 continue;
             var url;
             var lineNumber;
             if (script) {
                 url = WebInspector.displayNameForURL(script.sourceURL);
                 lineNumber = frame.location().lineNumber + 1;
             } else {
                 url = "(internal script)";
@@ skipping 190 matching lines @@
 };
 
 InspectorTest.setQuiet = function(quiet)
 {
     InspectorTest._quiet = quiet;
 };
 
 InspectorTest.queryScripts = function(filter)
 {
     var scripts = [];
-    for (var scriptId in WebInspector.debuggerModel._scripts) {
-        var script = WebInspector.debuggerModel._scripts[scriptId];
+    for (var scriptId in InspectorTest.debuggerModel._scripts) {
+        var script = InspectorTest.debuggerModel._scripts[scriptId];
         if (!filter || filter(script))
             scripts.push(script);
     }
     return scripts;
 };
 
 InspectorTest.createScriptMock = function(url, startLine, startColumn, isContentScript, source, target, preRegisterCallback)
 {
     target = target || WebInspector.targetManager.mainTarget();
     var scriptId = ++InspectorTest._lastScriptId;
@@ skipping 35 matching lines @@
     return self.runtime.instancesPromise(WebInspector.SourcesView.EditorAction).then(function(editorActions) {
         for (var i = 0; i < editorActions.length; ++i) {
             if (editorActions[i] instanceof WebInspector.ScriptFormatterEditorAction)
                 return editorActions[i];
         }
         return null;
     });
 };
 
 };