Encapsulate implementation-specific timeline record handling in TimelineUIUtils

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 373 matching lines @@
             'front_end/timeline/TimelineJSProfile.js',
             'front_end/timeline/TimelineModel.js',
             'front_end/timeline/TimelineModelImpl.js',
             'front_end/timeline/TimelinePresentationModel.js',
             'front_end/timeline/TimelineOverviewPane.js',
             'front_end/timeline/TimelineEventOverview.js',
             'front_end/timeline/TimelineFlameChart.js',
             'front_end/timeline/TimelineFrameOverview.js',
             'front_end/timeline/TimelineMemoryOverview.js',
             'front_end/timeline/TimelineUIUtils.js',
+            'front_end/timeline/TimelineUIUtilsImpl.js',
             'front_end/timeline/TimelineView.js',
             'front_end/timeline/TimelinePowerGraph.js',
             'front_end/timeline/TimelinePowerOverview.js',
             'front_end/timeline/TimelinePanel.js',
             'front_end/timeline/TimelineTracingView.js',
             'front_end/timeline/TimelineLayersView.js',
             'front_end/timeline/TracingModel.js',
             'front_end/timeline/TracingTimelineModel.js',
             'front_end/timeline/TracingTimelineUIUtils.js',
             'front_end/timeline/TransformController.js'
@@ skipping 158 matching lines @@
             'front_end/temp_storage_shared_worker/TempStorageSharedWorker.js',
         ],
         'devtools_script_formatter_worker_js_files': [
             'front_end/script_formatter_worker/CSSFormatter.js',
             'front_end/script_formatter_worker/JavaScriptFormatter.js',
             'front_end/script_formatter_worker/ScriptFormatterWorker.js',
             'front_end/common/utilities.js',
         ],
     },
 }