Revert of Touchpad and wheel scroll latching for ChromeOS behind flag.

ui/events/blink/input_handler_proxy_unittest.cc

Index: ui/events/blink/input_handler_proxy_unittest.cc
diff --git a/ui/events/blink/input_handler_proxy_unittest.cc b/ui/events/blink/input_handler_proxy_unittest.cc
index 00e94d1a19ff1242e2c84f4d9abea1dcf0ed9c1e..0b7a14b7f1f258c5e4be18b7ed319903e5248f3e 100644
--- a/ui/events/blink/input_handler_proxy_unittest.cc
+++ b/ui/events/blink/input_handler_proxy_unittest.cc
@@ -454,10 +454,6 @@
     input_handler_->smooth_scroll_enabled_ = value;
   }
 
-  void SetTouchpadAndWheelScrollLatchingEnabled(bool value) {
-    input_handler_->touchpad_and_wheel_scroll_latching_enabled_ = value;
-  }
-
   base::HistogramTester& histogram_tester() {
     return histogram_tester_;
   }
@@ -920,100 +916,6 @@
   gesture_.setType(WebInputEvent::GestureFlingCancel);
   gesture_.sourceDevice = blink::WebGestureDeviceTouchpad;
   EXPECT_EQ(expected_disposition_, input_handler_->HandleInputEvent(gesture_));
-}
-
-TEST_P(InputHandlerProxyTest, GestureFlingTouchpadScrollLatchingEnabled) {
-  SetTouchpadAndWheelScrollLatchingEnabled(true);
-  // We shouldn't send any events to the widget for this gesture.
-  expected_disposition_ = InputHandlerProxy::DID_HANDLE;
-  VERIFY_AND_RESET_MOCKS();
-
-  EXPECT_CALL(mock_input_handler_, ScrollBegin(::testing::_, ::testing::_))
-      .WillOnce(testing::Return(kImplThreadScrollState));
-
-  // HandleGestureScrollBegin will set gesture_scroll_on_impl_thread_.
-  gesture_.setType(WebInputEvent::GestureScrollBegin);
-  EXPECT_EQ(expected_disposition_, input_handler_->HandleInputEvent(gesture_));
-  EXPECT_TRUE(input_handler_->gesture_scroll_on_impl_thread_for_testing());
-
-  VERIFY_AND_RESET_MOCKS();
-
-  // On the fling start, we should schedule an animation but not actually start
-  // scrolling.
-  gesture_.setType(WebInputEvent::GestureFlingStart);
-  WebFloatPoint fling_delta = WebFloatPoint(1000, 0);
-  WebPoint fling_point = WebPoint(7, 13);
-  WebPoint fling_global_point = WebPoint(17, 23);
-  // Note that for trackpad, wheel events with the Control modifier are
-  // special (reserved for zoom), so don't set that here.
-  int modifiers = WebInputEvent::ShiftKey | WebInputEvent::AltKey;
-  gesture_ = CreateFling(blink::WebGestureDeviceTouchpad, fling_delta,
-                         fling_point, fling_global_point, modifiers);
-  EXPECT_SET_NEEDS_ANIMATE_INPUT(1);
-  EXPECT_CALL(mock_input_handler_, ScrollBegin(testing::_, testing::_))
-      .WillOnce(testing::Return(kImplThreadScrollState));
-
-  // When scroll latching is enabled, ScrollEnd shouldn't get called while
-  // handling GestureFlingStart.
-  EXPECT_CALL(mock_input_handler_, ScrollEnd(testing::_)).Times(0);
-  EXPECT_EQ(expected_disposition_, input_handler_->HandleInputEvent(gesture_));
-
-  VERIFY_AND_RESET_MOCKS();
-
-  // The first animate call won't start scrolling.
-  EXPECT_SET_NEEDS_ANIMATE_INPUT(1);
-  base::TimeTicks time = base::TimeTicks() + base::TimeDelta::FromSeconds(10);
-  Animate(time);
-
-  VERIFY_AND_RESET_MOCKS();
-
-  // The second call should start scrolling in the -X direction.
-  EXPECT_SET_NEEDS_ANIMATE_INPUT(1);
-  EXPECT_CALL(mock_input_handler_,
-              GetEventListenerProperties(cc::EventListenerClass::kMouseWheel))
-      .WillOnce(testing::Return(cc::EventListenerProperties::kNone));
-
-  // When scroll latching is enabled, ScrollBegin shouldn't get called for
-  // every tick.
-  EXPECT_CALL(mock_input_handler_, ScrollBegin(testing::_, testing::_))
-      .Times(0);
-  EXPECT_CALL(
-      mock_input_handler_,
-      ScrollBy(testing::Property(&cc::ScrollState::delta_x, testing::Lt(0))))
-      .WillOnce(testing::Return(scroll_result_did_scroll_));
-
-  // When scroll latching is enabled, ScrollEnd shouldn't get called for every
-  // tick.
-  EXPECT_CALL(mock_input_handler_, ScrollEnd(testing::_)).Times(0);
-  time += base::TimeDelta::FromMilliseconds(100);
-  Animate(time);
-
-  VERIFY_AND_RESET_MOCKS();
-
-  // The last call should stop scrolling.
-  EXPECT_CALL(mock_input_handler_,
-              GetEventListenerProperties(cc::EventListenerClass::kMouseWheel))
-      .WillOnce(testing::Return(cc::EventListenerProperties::kNone));
-
-  // When scroll latching is enabled, ScrollBegin shouldn't get called for
-  // every tick.
-  EXPECT_CALL(mock_input_handler_, ScrollBegin(testing::_, testing::_))
-      .Times(0);
-  EXPECT_CALL(
-      mock_input_handler_,
-      ScrollBy(testing::Property(&cc::ScrollState::delta_x, testing::Lt(0))))
-      .WillOnce(testing::Return(scroll_result_did_not_scroll_));
-
-  // When scroll latching is enabled, ScrollEnd gets called when the last
-  // ScrollBy did not scroll.
-  EXPECT_CALL(mock_input_handler_, ScrollEnd(testing::_));
-  time += base::TimeDelta::FromMilliseconds(100);
-  Animate(time);
-
-  // Fling has ended, the last Animate won't cause any more wheel ticks.
-  EXPECT_CALL(mock_input_handler_, ScrollBy(testing::_)).Times(0);
-
-  VERIFY_AND_RESET_MOCKS();
 }
 
 TEST_P(InputHandlerProxyTest, GestureFlingOnMainThreadTouchpad) {