Scroll Customization Prototype (Not for review, WIP)

Source/core/page/scrolling/ScrollState.idl

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// FIXME: Link to spec, once specified.
+
+[
+    Constructor(optional double deltaX = 0,
+                optional double deltaY = 0,
+                optional double deltaGranularity = 0,
+                optional double velocityX = 0,
+                optional double velocityY = 0,
+                optional boolean inInertialPhase = false,
+                optional boolean isEnding = false),
+    GarbageCollected,
+    RuntimeEnabled=ScrollCustomization
+] interface ScrollState {
+    readonly attribute double deltaX;
+    readonly attribute double deltaY;
+    readonly attribute double deltaGranularity;
+    readonly attribute double velocityX;
+    readonly attribute double velocityY;
+    readonly attribute boolean inInertialPhase;
+    readonly attribute boolean isEnding;
+    readonly attribute boolean fromUserInput;
+    readonly attribute boolean shouldPropagate;
+
+    [RaisesException] void consumeDelta(double x, double y);
+    void distributeToScrollChainDescendant();
+};