DevTools: introduce ViewportDataGrid

Source/devtools/devtools.gypi

 #
 # Copyright (C) 2013 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 206 matching lines @@
             'front_end/ui/SplitView.js',
             'front_end/ui/StackView.js',
             'front_end/ui/StatusBarButton.js',
             'front_end/ui/SuggestBox.js',
             'front_end/ui/TabbedPane.js',
             'front_end/ui/TextEditor.js',
             'front_end/ui/TextPrompt.js',
             'front_end/ui/UIUtils.js',
             'front_end/ui/View.js',
             'front_end/ui/ViewportControl.js',
+            'front_end/ui/ViewportDataGrid.js',
             'front_end/ui/ZoomManager.js',
             'front_end/ui/treeoutline.js',
         ],
         'devtools_main_js_files': [
             'front_end/main/AdvancedApp.js',
             'front_end/main/App.js',
             'front_end/main/HelpScreenUntilReload.js',
             'front_end/main/Main.js',
             'front_end/main/OverridesView.js',
             'front_end/main/RenderingOptions.js',
@@ skipping 361 matching lines @@
             'front_end/Images/thumbHoverHoriz.png',
             'front_end/Images/thumbHoverVert.png',
             'front_end/Images/thumbVert.png',
             'front_end/Images/toolbarItemSelected.png',
         ],
         'devtools_extension_api_files': [
             'front_end/extensions/ExtensionAPI.js',
         ],
     },
 }