DevTools: Get rid of WebInspector.panels

LayoutTests/inspector/sources/debugger/debugger-return-value.html

Index: LayoutTests/inspector/sources/debugger/debugger-return-value.html
diff --git a/LayoutTests/inspector/sources/debugger/debugger-return-value.html b/LayoutTests/inspector/sources/debugger/debugger-return-value.html
index 04a697c0048a8b4dec99813826177095e68b233e..82ce1cf74d75d50e773cb4d92afde25efb0fb8ce 100644
--- a/LayoutTests/inspector/sources/debugger/debugger-return-value.html
+++ b/LayoutTests/inspector/sources/debugger/debugger-return-value.html
@@ -32,7 +32,7 @@ var test = function()
         if (stepCount < 2) {
             for (var i = 0, frame; frame = callFrames[i]; ++i)
                 InspectorTest.assertTrue(!frame.returnValue(), "Unexpected returnValue in frame #" + i);
-            WebInspector.panels.sources._stepOverButton.element.click();
+            WebInspector.inspectorView.panel("sources")._stepOverButton.element.click();
             InspectorTest.waitUntilResumed(InspectorTest.waitUntilPaused.bind(InspectorTest, step2));
         } else {
             InspectorTest.captureStackTrace(callFrames, null, { printReturnValue: true });