Devtools Animations: Add cubic bezier easing editor for animations

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/textPrompt.css',
             'front_end/ui/treeoutline.css',
             'front_end/ui/ActionRegistry.js',
             'front_end/ui/ColorSwatch.js',
             'front_end/ui/Context.js',
             'front_end/ui/ContextMenu.js',
             'front_end/ui/Dialog.js',
             'front_end/ui/DOMSyntaxHighlighter.js',
             'front_end/ui/DropDownMenu.js',
             'front_end/ui/DropTarget.js',
+            'front_end/ui/EditorPopoverHelper.js',
             'front_end/ui/EmptyWidget.js',
             'front_end/ui/FilterBar.js',
             'front_end/ui/ForwardedInputEventHandler.js',
             'front_end/ui/HelpScreen.js',
             'front_end/ui/HistoryInput.js',
             'front_end/ui/Infobar.js',
             'front_end/ui/InplaceEditor.js',
             'front_end/ui/KeyboardShortcut.js',
             'front_end/ui/Panel.js',
             'front_end/ui/Popover.js',
@@ skipping 130 matching lines @@
             'front_end/elements/ElementsPanel.js',
             'front_end/elements/ElementsSidebarPane.js',
             'front_end/elements/ElementsSidebarView.js',
             'front_end/elements/ElementsTreeElement.js',
             'front_end/elements/ElementsTreeOutline.js',
             'front_end/elements/EventListenersSidebarPane.js',
             'front_end/elements/MetricsSidebarPane.js',
             'front_end/elements/PlatformFontsSidebarPane.js',
             'front_end/elements/PropertiesSidebarPane.js',
             'front_end/elements/Spectrum.js',
-            'front_end/elements/StylesPopoverHelper.js',
+            'front_end/elements/StylesPopoverIcon.js',
             'front_end/elements/StylesSectionModel.js',
             'front_end/elements/StylesSidebarPane.js',
             'front_end/elements/ComputedStyleSidebarPane.js',
         ],
         'devtools_extensions_js_files': [
             'front_end/extensions/ExtensionAuditCategory.js',
             'front_end/extensions/ExtensionPanel.js',
             'front_end/extensions/ExtensionRegistryStub.js',
             'front_end/extensions/ExtensionServer.js',
             'front_end/extensions/ExtensionView.js',
@@ skipping 331 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',
         ],
     },
 }