Support vsync-aligned wheel event dispatch

content/browser/renderer_host/input/input_router_config_helper.cc

Index: content/browser/renderer_host/input/input_router_config_helper.cc
diff --git a/content/browser/renderer_host/input/input_router_config_helper.cc b/content/browser/renderer_host/input/input_router_config_helper.cc
index 24a4354a60f2a2cc1208e448f63433e964c6e6d7..7b91314b9909a7052703aef008431928ae6d8d10 100644
--- a/content/browser/renderer_host/input/input_router_config_helper.cc
+++ b/content/browser/renderer_host/input/input_router_config_helper.cc
@@ -5,6 +5,7 @@
 #include "content/browser/renderer_host/input/input_router_config_helper.h"
 
 #include "base/command_line.h"
+#include "cc/base/switches.h"
 #include "content/public/common/content_switches.h"
 #include "ui/events/gesture_detection/gesture_configuration.h"
 #include "ui/events/gesture_detection/gesture_detector.h"
@@ -70,6 +71,13 @@ InputRouterImpl::Config GetInputRouterConfigForPlatform() {
   InputRouterImpl::Config config;
   config.gesture_config = GetGestureEventQueueConfig();
   config.touch_config = GetTouchEventQueueConfig();
+#if !defined(OS_ANDROID)
+  config.buffer_wheel_events_until_flush =
+      base::CommandLine::ForCurrentProcess()->HasSwitch(
+          cc::switches::kEnableBeginFrameScheduling);
+#else
+  config.buffer_wheel_events_until_flush = false;
+#endif
   return config;
 }