[invalidations] Convert invalidations to use TreeOutline

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 559 matching lines @@
             'front_end/sources/XHRBreakpointsSidebarPane.js',
         ],
         'devtools_snippets_js_files': [
             'front_end/snippets/ScriptSnippetModel.js',
             'front_end/snippets/SnippetStorage.js',
         ],
         'devtools_temp_storage_shared_worker_js_files': [
             'front_end/temp_storage_shared_worker/TempStorageSharedWorker.js',
         ],
         'devtools_timeline_js_files': [
+            'front_end/timeline/invalidationsTree.css',
             'front_end/timeline/timelinePanel.css',
             'front_end/timeline/CountersGraph.js',
             'front_end/timeline/LayerDetailsView.js',
             'front_end/timeline/LayerTreeOutline.js',
             'front_end/timeline/LayerViewHost.js',
             'front_end/timeline/Layers3DView.js',
             'front_end/timeline/MemoryCountersGraph.js',
             'front_end/timeline/PaintProfilerView.js',
             'front_end/timeline/TimelineEventOverview.js',
             'front_end/timeline/TimelineFlameChart.js',
@@ skipping 148 matching lines @@
             'front_end/Images/thumbVert.png',
             'front_end/Images/toolbarItemSelected.png',
             'front_end/Images/touchCursor.png',
             'front_end/Images/touchCursor_2x.png',
         ],
         'devtools_extension_api_files': [
             'front_end/extensions/ExtensionAPI.js',
         ],
     },
 }