Fix direction of horizontal scroll when tilting the scroll wheel on Linux Aura

ui/events/x/events_x_unittest.cc

Index: ui/events/x/events_x_unittest.cc
diff --git a/ui/events/x/events_x_unittest.cc b/ui/events/x/events_x_unittest.cc
index 0c7f49d7a6d9d474db9fd1304aa99243f533b429..d4fc3af76b43ac74ac83954fccdd9511583782ce 100644
--- a/ui/events/x/events_x_unittest.cc
+++ b/ui/events/x/events_x_unittest.cc
@@ -89,7 +89,7 @@ TEST(EventsXTest, ButtonEvents) {
   EXPECT_EQ(location, ui::EventLocationFromNative(&event));
   offset = ui::GetMouseWheelOffset(&event);
   EXPECT_EQ(0, offset.y());
-  EXPECT_LT(offset.x(), 0);
+  EXPECT_GT(offset.x(), 0);
 
   // Scroll right.
   InitButtonEvent(&event, true, location, 7, 0);
@@ -98,7 +98,7 @@ TEST(EventsXTest, ButtonEvents) {
   EXPECT_EQ(location, ui::EventLocationFromNative(&event));
   offset = ui::GetMouseWheelOffset(&event);
   EXPECT_EQ(0, offset.y());
-  EXPECT_GT(offset.x(), 0);
+  EXPECT_LT(offset.x(), 0);
 
   // TODO(derat): Test XInput code.
 }