Devtools: [LayoutEditor] highlight changed value in the SSP

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 395 matching lines @@
             'front_end/elements/ElementsSidebarPane.js',
             'front_end/elements/ElementsSidebarView.js',
             'front_end/elements/ElementsTreeElement.js',
             'front_end/elements/ElementsTreeOutline.js',
             'front_end/elements/ElementStatePaneWidget.js',
             'front_end/elements/SharedSidebarModel.js',
             'front_end/elements/EventListenersWidget.js',
             'front_end/elements/MetricsSidebarPane.js',
             'front_end/elements/PlatformFontsWidget.js',
             'front_end/elements/PropertiesWidget.js',
+            'front_end/elements/PropertyChangeHighlighter.js',
             'front_end/elements/Spectrum.js',
             'front_end/elements/StylesPopoverHelper.js',
             'front_end/elements/StylesSectionModel.js',
             'front_end/elements/StylesSidebarPane.js',
             'front_end/elements/ComputedStyleWidget.js',
         ],
         'devtools_emulated_devices_js_files': [
         ],
         'devtools_emulated_devices_images': [
             'front_end/emulated_devices/google-nexus-5-horizontal-default-1x.png',
@@ skipping 366 matching lines @@
             'front_end/Images/toolbarItemSelected.png',
             'front_end/Images/touchCursor.png',
             'front_end/Images/touchCursor_2x.png',
             'front_end/Images/updateServiceWorker.svg',
         ],
         'devtools_extension_api_files': [
             'front_end/extensions/ExtensionAPI.js',
         ],
     },
 }