Remove unused MouseCursorEventFilter::was_mouse_warped_

ash/display/mouse_cursor_event_filter_unittest.cc

Index: ash/display/mouse_cursor_event_filter_unittest.cc
diff --git a/ash/display/mouse_cursor_event_filter_unittest.cc b/ash/display/mouse_cursor_event_filter_unittest.cc
index 3b4f9ee83a4247bc8f3bfff2a14a643b40ee7aa8..21a19bf7b4ffc3d466744d657cbb9f085906df1e 100644
--- a/ash/display/mouse_cursor_event_filter_unittest.cc
+++ b/ash/display/mouse_cursor_event_filter_unittest.cc
@@ -30,7 +30,6 @@ class MouseCursorEventFilterTest : public test::AshTestBase {
                                   gfx::Point point_in_screen) {
     bool is_warped = event_filter()->WarpMouseCursorIfNecessaryForTest(
         target_root, point_in_screen);
-    event_filter()->reset_was_mouse_warped_for_test();
     return is_warped;
   }
 
@@ -45,7 +44,6 @@ class MouseCursorEventFilterTest : public test::AshTestBase {
     event_filter()->OnMouseEvent(&pressed);
     bool is_warped = event_filter()->WarpMouseCursorIfNecessaryForTest(
         target_root, point_in_screen);
-    event_filter()->reset_was_mouse_warped_for_test();
 
     ui::MouseEvent released(ui::ET_MOUSE_RELEASED, location,
                             location, 0, 0);
@@ -155,8 +153,6 @@ TEST_F(MouseCursorEventFilterTest, WarpMouseDifferentScaleDisplaysInNative) {
   EXPECT_EQ("500,123",
             aura::Env::GetInstance()->last_mouse_location().ToString());
 
-  event_filter()->reset_was_mouse_warped_for_test();
-
   // Touch the edge of 2nd display again and make sure it warps to
   // 1st dislay.
   EXPECT_TRUE(event_filter()->WarpMouseCursorIfNecessaryForTest(