DevTools: remove dead code, disambiguate expand for sections.

third_party/WebKit/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 235 matching lines @@
             'front_end/ui/infobar.css',
             'front_end/ui/inspectorCommon.css',
             'front_end/ui/inspectorStyle.css',
             'front_end/ui/inspectorSyntaxHighlight.css',
             'front_end/ui/inspectorSyntaxHighlightDark.css',
             'front_end/ui/inspectorViewTabbedPane.css',
             'front_end/ui/listWidget.css',
             'front_end/ui/panelEnablerView.css',
             'front_end/ui/popover.css',
             'front_end/ui/progressIndicator.css',
-            'front_end/ui/propertiesSection.css',
             'front_end/ui/radioButton.css',
             'front_end/ui/reportView.css',
             'front_end/ui/searchableView.css',
-            'front_end/ui/section.css',
             'front_end/ui/sidebarPane.css',
             'front_end/ui/softContextMenu.css',
             'front_end/ui/smallIcon.css',
             'front_end/ui/splitWidget.css',
             'front_end/ui/toolbar.css',
             'front_end/ui/tooltip.css',
             'front_end/ui/suggestBox.css',
             'front_end/ui/tabbedPane.css',
             'front_end/ui/textButton.css',
             'front_end/ui/textPrompt.css',
@@ skipping 16 matching lines @@
             'front_end/ui/InspectorView.js',
             'front_end/ui/KeyboardShortcut.js',
             'front_end/ui/ListWidget.js',
             'front_end/ui/Panel.js',
             'front_end/ui/Popover.js',
             'front_end/ui/ProgressIndicator.js',
             'front_end/ui/ReportView.js',
             'front_end/ui/ResizerWidget.js',
             'front_end/ui/RootView.js',
             'front_end/ui/SearchableView.js',
-            'front_end/ui/Section.js',
             'front_end/ui/SettingsUI.js',
             'front_end/ui/ShortcutRegistry.js',
             'front_end/ui/SidebarPane.js',
             'front_end/ui/SidebarTreeElement.js',
             'front_end/ui/SoftContextMenu.js',
             'front_end/ui/SplitWidget.js',
             'front_end/ui/StackView.js',
             'front_end/ui/Toolbar.js',
             'front_end/ui/Tooltip.js',
             'front_end/ui/SuggestBox.js',
@@ skipping 591 matching lines @@
             'front_end/Images/toolbarResizerVertical.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',
         ],
     },
 }