Move overscroll logic out of EventHandler.

third_party/WebKit/Source/core/input/EventHandler.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010, 2011 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 46 matching lines @@
 class PaintLayerScrollableArea;
 class Document;
 class DragState;
 class Element;
 class Event;
 class EventTarget;
 template <typename EventType>
 class EventWithHitTestResults;
 class FloatPoint;
 class FloatQuad;
+class FrameHost;
 class HTMLFrameSetElement;
 class HitTestRequest;
 class HitTestResult;
 class KeyboardEvent;
 class LayoutObject;
 class LocalFrame;
 class Node;
 class OptionalCursor;
 class PlatformGestureEvent;
 class PlatformKeyboardEvent;
@@ skipping 156 matching lines @@
         PlatformTouchPoint point;
         Member<EventTarget> touchTarget;
         Member<LocalFrame> targetFrame;
         FloatPoint adjustedPagePoint;
         FloatSize adjustedRadius;
         bool knownTarget;
         bool consumed;
         String region;
     };
 
-    // TODO(bokan): This seems like it no longer belongs here.
-    void handleOverscroll(const ScrollResult&, const FloatPoint& positionInRootFrame = FloatPoint(), const FloatSize& velocity = FloatSize());
-
 private:
     static DragState& dragState();
 
     DataTransfer* createDraggingDataTransfer() const;
 
     WebInputEventResult handleMouseMoveOrLeaveEvent(const PlatformMouseEvent&, HitTestResult* hoveredNode = nullptr, bool onlyUpdateScrollbars = false, bool forceLeave = false);
     WebInputEventResult handleMousePressEvent(const MouseEventWithHitTestResults&);
     WebInputEventResult handleMouseFocus(const MouseEventWithHitTestResults&, InputDeviceCapabilities* sourceCapabilities);
     WebInputEventResult handleMouseDraggedEvent(const MouseEventWithHitTestResults&);
     WebInputEventResult handleMouseReleaseEvent(const MouseEventWithHitTestResults&);
@@ skipping 55 matching lines @@
     // most recently clicked node, falling back to the frame.
     // Returns true if the scroll was consumed.
     // direction - The logical direction to scroll in. This will be converted to
     //             a physical direction for each LayoutBox we try to scroll
     //             based on that box's writing mode.
     // granularity - The units that the  scroll delta parameter is in.
     // startNode - Optional. If provided, start chaining from the given node.
     //             If not, use the current focus or last clicked node.
     bool logicalScroll(ScrollDirection, ScrollGranularity, Node* startNode = nullptr);
 
-    void resetOverscroll(bool didScrollX, bool didScrollY);
-
     ScrollResult scrollBox(
         LayoutBox*,
         ScrollGranularity,
         const FloatSize& delta,
         const FloatPoint& position,
         const FloatSize& velocity,
         bool* wasRootScroller);
 
     bool isRootScroller(const Node&) const;
     void customizedScroll(const Node& startNode, ScrollState&);
@@ skipping 62 matching lines @@
 
     // If the given element is a shadow host and its root has delegatesFocus=false flag,
     // slide focus to its inner element. Returns true if the resulting focus is different from
     // the given element.
     bool slideFocusOnShadowHostIfNecessary(const Element&);
 
     void dispatchPointerEvents(const PlatformTouchEvent&, HeapVector<TouchInfo>&);
 
     WebInputEventResult dispatchTouchEvents(const PlatformTouchEvent&, HeapVector<TouchInfo>&, bool);
 
+    FrameHost* frameHost();
+
     // NOTE: If adding a new field to this class please ensure that it is
     // cleared in |EventHandler::clear()|.
 
     const Member<LocalFrame> m_frame;
 
     // Current button-press state for mouse/mouse-like-stylus.
     // TODO(crbug.com/563676): Buggy for chorded buttons.
     bool m_mousePressed;
 
     bool m_capturesDragging;
@@ skipping 30 matching lines @@
     int m_clickCount;
     Member<Node> m_clickNode;
 
     Member<Node> m_dragTarget;
     bool m_shouldOnlyFireDragOverEvent;
 
     Member<HTMLFrameSetElement> m_frameSetBeingResized;
 
     LayoutSize m_offsetFromResizeCorner; // In the coords of m_resizeScrollableArea.
 
-    FloatSize m_accumulatedRootOverscroll;
-
     bool m_mousePositionIsUnknown;
     // The last mouse movement position this frame has seen in root frame coordinates.
     IntPoint m_lastKnownMousePosition;
     IntPoint m_lastKnownMouseGlobalPosition;
     IntPoint m_mouseDownPos; // In our view's coords.
     double m_mouseDownTimestamp;
     PlatformMouseEvent m_mouseDown;
     RefPtr<UserGestureToken> m_lastMouseDownUserGestureToken;
 
     // The target of each active touch point indexed by the touch ID.
@@ skipping 35 matching lines @@
     // scroll which shouldn't propagate can't cause any element to
     // scroll other than the |m_previousGestureScrolledNode|.
     bool m_deltaConsumedForScrollSequence;
 };
 
 } // namespace blink
 
 WTF_ALLOW_INIT_WITH_MEM_FUNCTIONS(blink::EventHandler::TouchInfo);
 
 #endif // EventHandler_h