Move have_wheel_event_handlers to WebLayerTreeView.

third_party/WebKit/public/platform/WebLayer.h

 /*
  * Copyright (C) 2011 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:
  *
  * 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
@@ skipping 183 matching lines @@
     // this function and cc side would just work.
     virtual void setScrollCompensationAdjustment(WebDoublePoint) = 0;
 
     // To set a WebLayer as scrollable we must specify the corresponding clip layer.
     virtual void setScrollClipLayer(WebLayer*) = 0;
     virtual bool scrollable() const = 0;
     virtual void setUserScrollable(bool horizontal, bool vertical) = 0;
     virtual bool userScrollableHorizontal() const = 0;
     virtual bool userScrollableVertical() const = 0;
 
-    virtual void setHaveWheelEventHandlers(bool) = 0;
     virtual bool haveWheelEventHandlers() const = 0;
 
     virtual void setHaveScrollEventHandlers(bool) = 0;
     virtual bool haveScrollEventHandlers() const = 0;
 
     // Indicates that this layer will always scroll on the main thread for the provided reason.
     virtual void addMainThreadScrollingReasons(uint32_t) = 0;
     // Indicates that the layer could scroll on the compositor thread.
     virtual void clearMainThreadScrollingReasons() = 0;
     virtual bool shouldScrollOnMainThread() const = 0;
@@ skipping 44 matching lines @@
     virtual void setElementId(uint64_t) = 0;
     virtual uint64_t elementId() const = 0;
 
     virtual void setCompositorMutableProperties(uint32_t) = 0;
     virtual uint32_t compositorMutableProperties() const = 0;
 };
 
 } // namespace blink
 
 #endif // WebLayer_h