Wheel scroll latching enabled behind flag.

content/browser/renderer_host/input/mouse_wheel_event_queue_unittest.cc

Index: content/browser/renderer_host/input/mouse_wheel_event_queue_unittest.cc
diff --git a/content/browser/renderer_host/input/mouse_wheel_event_queue_unittest.cc b/content/browser/renderer_host/input/mouse_wheel_event_queue_unittest.cc
index 319563c4afd0d5f5ba951c9f437210c0bc381e97..b507320327148a53a0f91a87139bda3ea60de1e5 100644
--- a/content/browser/renderer_host/input/mouse_wheel_event_queue_unittest.cc
+++ b/content/browser/renderer_host/input/mouse_wheel_event_queue_unittest.cc
@@ -30,7 +30,8 @@ const float kWheelScrollX = 10;
 const float kWheelScrollY = 12;
 const float kWheelScrollGlobalX = 50;
 const float kWheelScrollGlobalY = 72;
-const int64_t kScrollEndTimeoutMs = 100;
+const bool kTouchpadAndWheelScrollLatching = true;
+const int64_t kScrollEndTimeoutMs = kTouchpadAndWheelScrollLatching ? 100 : 0;
 
 base::TimeDelta DefaultScrollEndTimeoutDelay() {
   return base::TimeDelta::FromMilliseconds(kScrollEndTimeoutMs);
@@ -146,7 +147,8 @@ class MouseWheelEventQueueTest : public testing::Test,
   MouseWheelEventQueueTest()
       : acked_event_count_(0),
         last_acked_event_state_(INPUT_EVENT_ACK_STATE_UNKNOWN) {
-    queue_.reset(new MouseWheelEventQueue(this, kScrollEndTimeoutMs));
+    queue_.reset(
+        new MouseWheelEventQueue(this, kTouchpadAndWheelScrollLatching));
   }
 
   ~MouseWheelEventQueueTest() override {}