From 01ef24d928b8455b580074501461bf9e9e702083 Mon Sep 17 00:00:00 2001
From: Marshall Greenblatt <magreenblatt@gmail.com>
Date: Thu, 27 Sep 2018 14:17:48 +0200
Subject: [PATCH] Fix DCHECK when mouse wheel deltas are 0 (issue #2515)

---
 libcef/browser/browser_host_impl.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libcef/browser/browser_host_impl.cc b/libcef/browser/browser_host_impl.cc
index 74f552d46..a628beb9f 100644
--- a/libcef/browser/browser_host_impl.cc
+++ b/libcef/browser/browser_host_impl.cc
@@ -1213,6 +1213,11 @@ void CefBrowserHostImpl::SendMouseMoveEvent(const CefMouseEvent& event,
 void CefBrowserHostImpl::SendMouseWheelEvent(const CefMouseEvent& event,
                                              int deltaX,
                                              int deltaY) {
+  if (deltaX == 0 && deltaY == 0) {
+    // Nothing to do.
+    return;
+  }
+
   if (!CEF_CURRENTLY_ON_UIT()) {
     CEF_POST_TASK(CEF_UIT,
                   base::BindOnce(&CefBrowserHostImpl::SendMouseWheelEvent, this,