Don't treat first touch move differently from future touch moves

content/browser/renderer_host/input/touch_event_queue_unittest.cc

Index: content/browser/renderer_host/input/touch_event_queue_unittest.cc
diff --git a/content/browser/renderer_host/input/touch_event_queue_unittest.cc b/content/browser/renderer_host/input/touch_event_queue_unittest.cc
index 06a3a9f40f3e1113a1341b17228683afe45f76b6..da1b05cac310348d9b6acdd9d38e0c6a1e05e518 100644
--- a/content/browser/renderer_host/input/touch_event_queue_unittest.cc
+++ b/content/browser/renderer_host/input/touch_event_queue_unittest.cc
@@ -859,13 +859,16 @@ TEST_F(TouchEventQueueTest, TouchCancelOnScroll) {
   EXPECT_EQ(1U, queued_event_count());
   EXPECT_EQ(1U, GetAndResetSentEventCount());
 
+  MoveTouchPoint(0, 30, 15);
+  EXPECT_EQ(2U, queued_event_count());
+  EXPECT_EQ(0U, GetAndResetSentEventCount());
+
   // Queue another TouchStart.
   PressTouchPoint(20, 20);
-  EXPECT_EQ(2U, queued_event_count());
+  EXPECT_EQ(3U, queued_event_count());
   EXPECT_EQ(0U, GetAndResetSentEventCount());
   EXPECT_EQ(WebInputEvent::TouchStart, latest_event().type);
 
-  // GestureScrollBegin inserts a synthetic TouchCancel before the TouchStart.
   WebGestureEvent followup_scroll;
   followup_scroll.type = WebInputEvent::GestureScrollBegin;
   SetFollowupEvent(followup_scroll);
@@ -873,6 +876,16 @@ TEST_F(TouchEventQueueTest, TouchCancelOnScroll) {
   EXPECT_EQ(1U, GetAndResetSentEventCount());
   EXPECT_EQ(1U, GetAndResetAckedEventCount());
   EXPECT_EQ(2U, queued_event_count());
+  EXPECT_TRUE(sent_event().cancelable);
+  EXPECT_EQ(WebInputEvent::TouchMove, sent_event().type);
+
+  // GestureScrollUpdate inserts a synthetic TouchCancel before the TouchStart.
+  followup_scroll.type = WebInputEvent::GestureScrollUpdate;
+  SetFollowupEvent(followup_scroll);
+  SendTouchEventAck(INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
+  EXPECT_EQ(1U, GetAndResetSentEventCount());
+  EXPECT_EQ(1U, GetAndResetAckedEventCount());
+  EXPECT_EQ(2U, queued_event_count());
   EXPECT_EQ(WebInputEvent::TouchCancel, sent_event().type);
   EXPECT_FALSE(sent_event().cancelable);
   EXPECT_EQ(WebInputEvent::TouchStart, latest_event().type);
@@ -1717,8 +1730,7 @@ TEST_F(TouchEventQueueTest, AsyncTouchThrottledAfterScroll) {
   SendTouchEventAck(INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
   EXPECT_EQ(1U, GetAndResetAckedEventCount());
 
-  // Now send the first touch move and associated GestureScrollBegin,
-  // but don't ACK the gesture event yet.
+  // Now send the first touch move and associated GestureScrollBegin.
   MoveTouchPoint(0, 0, 5);
   WebGestureEvent followup_scroll;
   followup_scroll.type = WebInputEvent::GestureScrollBegin;
@@ -1726,6 +1738,17 @@ TEST_F(TouchEventQueueTest, AsyncTouchThrottledAfterScroll) {
   SendTouchEventAck(INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
   EXPECT_EQ(1U, GetAndResetSentEventCount());
   EXPECT_EQ(1U, GetAndResetAckedEventCount());
+  SendGestureEventAck(WebInputEvent::GestureScrollBegin,
+                      INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
+
+  // Send the second touch move and associated GestureScrollUpdate, but don't
+  // ACK the gesture event yet.
+  MoveTouchPoint(0, 0, 5);
+  followup_scroll.type = WebInputEvent::GestureScrollUpdate;
+  SetFollowupEvent(followup_scroll);
+  SendTouchEventAck(INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
+  EXPECT_EQ(1U, GetAndResetSentEventCount());
+  EXPECT_EQ(1U, GetAndResetAckedEventCount());
 
   // Now queue a second touchmove and verify it's not (yet) dispatched.
   MoveTouchPoint(0, 0, 10);
@@ -1760,7 +1783,7 @@ TEST_F(TouchEventQueueTest, AsyncTouchThrottledAfterScroll) {
 
   // Now mark the scroll as not consumed (which would cause future
   // touchmoves in the active sequence to be sent if there was one).
-  SendGestureEventAck(WebInputEvent::GestureScrollBegin,
+  SendGestureEventAck(WebInputEvent::GestureScrollUpdate,
       INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
 
   // Start a new touch sequence and verify that throttling has been reset.
@@ -1770,10 +1793,19 @@ TEST_F(TouchEventQueueTest, AsyncTouchThrottledAfterScroll) {
   SendTouchEventAck(INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
   EXPECT_EQ(1U, GetAndResetAckedEventCount());
   MoveTouchPoint(0, 0, 5);
+  followup_scroll.type = WebInputEvent::GestureScrollBegin;
+  SetFollowupEvent(followup_scroll);
+  SendTouchEventAck(INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
+  EXPECT_EQ(1U, GetAndResetSentEventCount());
+  EXPECT_EQ(1U, GetAndResetAckedEventCount());
+
+  MoveTouchPoint(0, 0, 5);
+  followup_scroll.type = WebInputEvent::GestureScrollUpdate;
   SetFollowupEvent(followup_scroll);
   SendTouchEventAck(INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
   EXPECT_EQ(1U, GetAndResetSentEventCount());
   EXPECT_EQ(1U, GetAndResetAckedEventCount());
+
   MoveTouchPoint(0, 0, 10);
   SendTouchEventAck(INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
   EXPECT_TRUE(HasPendingAsyncTouchMove());
@@ -1993,6 +2025,8 @@ TEST_F(TouchEventQueueTest, AsyncTouchWithTouchCancelAfterAck) {
   EXPECT_EQ(1U, GetAndResetAckedEventCount());
   EXPECT_EQ(0U, queued_event_count());
 
+  SendGestureEvent(WebInputEvent::GestureScrollUpdate);
+
   // The async touchmove should be ack'ed immediately, but not forwarded.
   // However, because the ack triggers a touchcancel, both the pending touch and
   // the queued touchcancel should be flushed.
@@ -2010,7 +2044,7 @@ TEST_F(TouchEventQueueTest, AsyncTouchWithTouchCancelAfterAck) {
   EXPECT_EQ(1U, GetAndResetAckedEventCount());
   EXPECT_EQ(1U, GetAndResetSentEventCount());
 
-  // The ack for the asnc touchmove should not reach the client, as it has
+  // The ack for the async touchmove should not reach the client, as it has
   // already been ack'ed.
   SendTouchEventAck(INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
   EXPECT_FALSE(sent_event().cancelable);
@@ -2026,4 +2060,45 @@ TEST_F(TouchEventQueueTest, AsyncTouchWithTouchCancelAfterAck) {
   EXPECT_EQ(0U, GetAndResetSentEventCount());
 }
 
+TEST_F(TouchEventQueueTest, TouchAbsorptionWithConsumedFirstMove) {
+  SetTouchScrollingMode(TouchEventQueue::TOUCH_SCROLLING_MODE_ASYNC_TOUCHMOVE);
+
+  // Queue a TouchStart.
+  PressTouchPoint(0, 1);
+  SendTouchEventAck(INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
+  EXPECT_EQ(0U, queued_event_count());
+  EXPECT_EQ(1U, GetAndResetAckedEventCount());
+
+  MoveTouchPoint(0, 20, 5);
+  SendGestureEvent(blink::WebInputEvent::GestureScrollBegin);
+  SendTouchEventAck(INPUT_EVENT_ACK_STATE_CONSUMED);
+  EXPECT_EQ(0U, queued_event_count());
+  EXPECT_EQ(2U, GetAndResetSentEventCount());
+
+  // Even if the first touchmove event was consumed, subsequent unconsumed
+  // touchmove events should trigger scrolling.
+  MoveTouchPoint(0, 60, 5);
+  SendTouchEventAck(INPUT_EVENT_ACK_STATE_CONSUMED);
+  EXPECT_EQ(0U, queued_event_count());
+  EXPECT_TRUE(sent_event().cancelable);
+  EXPECT_EQ(1U, GetAndResetSentEventCount());
+
+  MoveTouchPoint(0, 20, 5);
+  WebGestureEvent followup_scroll;
+  followup_scroll.type = WebInputEvent::GestureScrollUpdate;
+  SetFollowupEvent(followup_scroll);
+  SendTouchEventAck(INPUT_EVENT_ACK_STATE_NOT_CONSUMED);
+  SendGestureEventAck(WebInputEvent::GestureScrollUpdate,
+                      INPUT_EVENT_ACK_STATE_CONSUMED);
+  EXPECT_EQ(0U, queued_event_count());
+  EXPECT_TRUE(sent_event().cancelable);
+  EXPECT_EQ(1U, GetAndResetSentEventCount());
+
+  MoveTouchPoint(0, 60, 5);
+  SendTouchEventAck(INPUT_EVENT_ACK_STATE_CONSUMED);
+  EXPECT_EQ(0U, queued_event_count());
+  EXPECT_FALSE(sent_event().cancelable);
+  EXPECT_EQ(1U, GetAndResetSentEventCount());
+}
+
 }  // namespace content