test-shell is outside of the screen when running layout tests.

Tools/DumpRenderTree/chromium/TestShell.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 247 matching lines @@
 void TestShell::resizeWindowForTest(WebViewHost* window, const WebURL& url)
 {
     int width, height;
     if (isSVGTestURL(url)) {
         width = SVGTestWindowWidth;
         height = SVGTestWindowHeight;
     } else {
         width = testWindowWidth;
         height = testWindowHeight;
     }
-    window->setWindowRect(WebRect(0, 0, width + virtualWindowBorder * 2, height + virtualWindowBorder * 2));
+    window->setWindowRect(WebRect(window->screenUnavailabeBorder(), window->screenUnavailabeBorder(), width + virtualWindowBorder * 2, height + virtualWindowBorder * 2));
 }
 
 void TestShell::resetTestController()
 {
     resetWebSettings(*webView());
     m_testInterfaces->resetAll();
     m_devToolsTestInterfaces->resetAll();
     m_webViewHost->reset();
     m_drtDevToolsAgent->reset();
     if (m_drtDevToolsClient)
@@ skipping 275 matching lines @@
     for (size_t index = 0; index < entryCount; ++index) {
         WebHistoryItem historyItem = navigationController.entryAtIndex(index)->contentState();
         if (historyItem.isNull()) {
             historyItem.initialize();
             historyItem.setURLString(navigationController.entryAtIndex(index)->URL().spec().utf16());
         }
         result[index] = historyItem;
     }
     history->swap(result);
 }