Remove canScroll from WebMouseWheelEvent as it is unused now.

content/common/input/web_input_event_traits.h

 // Copyright 2013 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.
 
 #ifndef CONTENT_COMMON_INPUT_WEB_INPUT_EVENT_TRAITS_H_
 #define CONTENT_COMMON_INPUT_WEB_INPUT_EVENT_TRAITS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 11 matching lines @@
   static std::string ToString(const blink::WebInputEvent& event);
   static size_t GetSize(blink::WebInputEvent::Type type);
   static ScopedWebInputEvent Clone(const blink::WebInputEvent& event);
   static void Delete(blink::WebInputEvent* event);
   static bool CanCoalesce(const blink::WebInputEvent& event_to_coalesce,
                           const blink::WebInputEvent& event);
   static void Coalesce(const blink::WebInputEvent& event_to_coalesce,
                        blink::WebInputEvent* event);
   static bool ShouldBlockEventStream(const blink::WebInputEvent& event);
 
+  static bool ShouldCauseScroll(const blink::WebMouseWheelEvent& event);

[tdresser, 2016/06/10 18:06:46]

Perhaps "MayCauseScroll"?

We don't know for sure that something should cause a scroll if this return true,
we just know that it can't cause a scroll if this returns false.

[Charlie Reis, 2016/06/10 18:47:58]

+1.  Or CanCauseScroll, to be consistent with CanCoalesce and the old canScroll.

[dtapuska, 2016/06/10 19:11:17]

Done.

[dtapuska, 2016/06/10 19:11:17]

Acknowledged.

+
   // Return uniqueTouchEventId for WebTouchEvent, otherwise return 0.
   static uint32_t GetUniqueTouchEventId(const blink::WebInputEvent& event);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_INPUT_WEB_INPUT_EVENT_TRAITS_H_