Roll 50: Copied IDLs, PYTHON scripts from WebKit removed deleted files in WebCore

core/page/scrolling/ScrollState.idl

 // Copyright 2015 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.
 
-// http://dev.w3.org/houdini/css-scroll-api/
+// https://docs.google.com/document/d/1VnvAqeWFG9JFZfgG5evBqrLGDZYRE5w6G5jEDORekPY
 
 [
-    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 isBeginning = false,
-                optional boolean isEnding = false),
-    WillBeGarbageCollected,
-    RuntimeEnabled=ScrollCustomization
-] interface ScrollState {
+  Constructor(optional ScrollStateInit scrollStateInit),
+  WillBeGarbageCollected,
+  RuntimeEnabled = ScrollCustomization,
+] interface ScrollState
+{
     readonly attribute double deltaX;
     readonly attribute double deltaY;
-    readonly attribute double deltaGranularity;
+    readonly attribute long startPositionX;
+    readonly attribute long startPositionY;
     readonly attribute double velocityX;
     readonly attribute double velocityY;
+    readonly attribute boolean isBeginning;
     readonly attribute boolean inInertialPhase;
     readonly attribute boolean isEnding;
-    readonly attribute boolean isBeginning;
+    readonly attribute boolean shouldPropagate;
     readonly attribute boolean fromUserInput;
-    readonly attribute boolean shouldPropagate;
+    readonly attribute boolean isDirectManipulation;
+    readonly attribute double deltaGranularity;
 
     [RaisesException] void consumeDelta(double x, double y);
-    // FIXME: implement distributeToScrollChainDescendent.
+    void distributeToScrollChainDescendant();
 };