Plumb phase/momentum for WheelEvent.

content/browser/renderer_host/input/web_input_event_builders_mac.mm

 // 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.
 
 /*
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2006-2009 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ skipping 401 matching lines @@
   }
   result.id = [event deviceID];
   result.force = [event pressure];
   return result;
 }
 
 // WebMouseWheelEvent ---------------------------------------------------------
 
 blink::WebMouseWheelEvent WebMouseWheelEventBuilder::Build(
     NSEvent* event,
-    NSView* view,
-    bool can_rubberband_left,
-    bool can_rubberband_right) {
+    NSView* view) {
   blink::WebMouseWheelEvent result;
 
   result.type = blink::WebInputEvent::MouseWheel;
   result.button = blink::WebMouseEvent::ButtonNone;
 
   result.modifiers = ModifiersFromEvent(event);
 
   SetWebEventLocationFromEventInView(&result, event, view);
 
-  result.canRubberbandLeft = can_rubberband_left;
-  result.canRubberbandRight = can_rubberband_right;
-
   // Of Mice and Men
   // ---------------
   //
   // There are three types of scroll data available on a scroll wheel CGEvent.
   // Apple's documentation ([1]) is rather vague in their differences, and not
   // terribly helpful in deciding which to use. This is what's really going on.
   //
   // First, these events behave very differently depending on whether a standard
   // wheel mouse is used (one that scrolls in discrete units) or a
   // trackpad/Mighty Mouse is used (which both provide continuous scrolling).
@@ skipping 167 matching lines @@
       break;
     default:
       NOTIMPLEMENTED();
       result.type = blink::WebInputEvent::Undefined;
   }
 
   return result;
 }
 
 }  // namespace content