Postpone rail application for touch scrolling - chrome side.

ui/events/gesture_detection/gesture_provider_unittest.cc

Index: ui/events/gesture_detection/gesture_provider_unittest.cc
diff --git a/ui/events/gesture_detection/gesture_provider_unittest.cc b/ui/events/gesture_detection/gesture_provider_unittest.cc
index 1f8d2d8182c005554a74f2c7e830e53bca017ad0..ca5978fae17afac6781440a8a099a522e51fb7f2 100644
--- a/ui/events/gesture_detection/gesture_provider_unittest.cc
+++ b/ui/events/gesture_detection/gesture_provider_unittest.cc
@@ -839,9 +839,10 @@ TEST_F(GestureProviderTest, ScrollUpdateValues) {
   EXPECT_EQ(kFakeCoordY - delta_y + raw_offset_y, gesture.raw_y);
   EXPECT_EQ(1, gesture.details.touch_points());
 
-  // No horizontal delta because of snapping.
-  EXPECT_EQ(0, gesture.details.scroll_x());
+  EXPECT_EQ(-delta_x / 2, gesture.details.scroll_x());
   EXPECT_EQ(-delta_y / 2, gesture.details.scroll_y());
+  EXPECT_EQ(GestureEventDetails::ScrollRailState::Vertical,
+            gesture.details.scroll_rail_state());
 }
 
 // Verify that fractional scroll deltas are rounded as expected and that
@@ -891,8 +892,11 @@ TEST_F(GestureProviderTest, FractionalScroll) {
     EXPECT_GE(gesture.details.scroll_y(), (int)delta_y);
     EXPECT_LE(gesture.details.scroll_y(), ((int)delta_y) + 1);
 
-    // And that there has been no horizontal motion at all.
-    EXPECT_EQ(0, gesture.details.scroll_x());
+    // And that there has been very little horizontal motion.
+    EXPECT_GT(gesture.details.scroll_x(), 0);
+    EXPECT_LT(gesture.details.scroll_x(), 0.5);
+    EXPECT_EQ(GestureEventDetails::ScrollRailState::Vertical,
+              gesture.details.scroll_rail_state());
   }
 }